Abbreviation,Definition
A,Atom
a,atto prefix (10-18)
AA,Acetic Acid
AA,Amino Acid
AA,Atomic Absorption spectroscopy
AACC,American Association for Clinical Chemistry
AADC,Amino Acid DeCarboxylase
AADC,Aromatic L-Amino acid DeCarboxylase
AAS,Atomic Absorption Spectroscopy
AB,Acid Base
AB,Acid Bath
ABC,Atomic, Biological, Chemical
ABCC,Advanced Biomedical Computing Center
ABCC,American Board of Clinical Chemistry
ABS,Acrylonitrile Butadiene Styrene
ABS,Absorb
ABV,Alcohol By Volume
ABW,Alcohol By Weight
Ac,Actinium
AC,Aromatic Carbon
ACC,American Chemical Council
ACE,Acetate
ACS,American Chemical Society
ADP,Adenosine DiPhosphate
AE,Activation Energy
AE,Atomic Emission
AE,Acid Equivalent
AFS,Atomic Fluorescence Spectroscopy
Ag,Silver
AH,Aryl Hydrocarbon
AHA,Alpha Hydroxy Acid
Al,Aluminum
ALDH,ALdehyde DeHydrogenase
Am,Americium
AM,Atomic Mass
AMP,Adenosine MonoPhosphate
AMU,Atomic Mass Unit
AN,Ammonium Nitrate
ANSI,American National Standards Institute
AO,Aqueous Oxygen
AO,Aldehyde Oxidase
API,Aromatic PolyImide
AR,Analytical Reagent
Ar,Argon
As,Arsenic
AS,Ammonium Sulfate
ASA,AcetylSalicylic Acid
ASP,ASParate
AT,Adenine and Thymine
AT,Alkaline Transition
At,Astatine
AT NO,Atomic Number
ATP,Adenosine TriPhosphate
ATP,Ambient Temperature Pressure
Au,Gold
AW,Atomic Weight
B,Boron
Ba,Barium
BA,Benzyl Alcohol
BA,Bonding Activity
BA,Butyl Acetate
B[a]P,Benzo[a]Pyrene
BAP,Benzyl Amino Purine
BC,Bond Centered
BC,Boron Carbide
BCAA,Branched Chain Amino Acid
BCC,Body Centered Cubic
BCF,Black Carbon Fiber
BD,Black Diamond
Be,Beryllium
BE- Bond Energy
BeV,Billion Electron Volt (equal to 1 GeV)
BFR,Brominated Flame Retardants
Bh,Bohrium
BHA,Butylated Hydroxy Acid
BHA,Butylated HydroxyAnisole
BHD,Benzene Hydrogen Donor
BHT,Butylated Hydroxy Toluene
Bi,Bismuth
Bk,Berkelium
BLEVE,Boiling Liquid Expanding Vapor Explosion
BM,Base Metal
BMDL,Below Method Detection Limits
BOD,Biological Organic Deposit
BOV,Blow Off Valve
BP,Benzoyl Peroxide
BP,Boiling Point
BPDE,Benzo[A]Pyrene-Diol-Epoxide BPE,Boiling Point Elevation
BPO,Benzoyl PerOxide
Br,Bromine
BTA,BuTylated hydroxyAnisole
BTEX,Benzene, Toluene, Ethylbenzene, and Xylene
BTTN,1,2,4-ButaneTriol TriNitrate
BTX,Benzene, Toluene, Xylene
BWR,Boiling Water Reactor
Bz,Benzoyl functional group
BZP,BenZylPiperazine
C,Carbon
C,Celsius
c,centi prefix (10-2)
C,Coulomb
C,Cytosine
Ca,Calcium
CA,Citric Acid
CAB,Cation-Anion Balance
CADS,Chemical Agent Detection System
CAR,Commercial And Residential
CAS,Chemical Abstracts Service
CAW,Catalyst Altered Water
CB,Conduction Band
CBA,Cytometric Bead Array
CBR,Chemical, Biological, Radiological
CBRE,Chemical, Biological, Radiological Element
CBRN,Chemical, Biological, Radiological, or Nuclear
CC,Cubic Centimeter
CCBA,Chemical Coordinate Bonding and Adsorption
CCL,Contaminant Candidate List
CCM,cubic centimeter
CCS,Carbon Capture Storage
Cd,Cadmium
CDA,Clean Dry Air
CDR,Chemical Distribution Room
CDSL,Chemical Data Summary List
CDU,Chemical Dispensing Unit
Ce,Cerium
CE,Chemical Engineering
CEP,Chemical Engineering Process
Cf,Californium
CF,Carbon Fiber
CF,Ceramic Fiber
CFA,Cetylated Fatty Acid
CFC,Chlorofluorocarbon
CFRP,Carbon Fiber Reinforced Plastic
cg,centigram
CGS,Centimeter, Gram, Second
CHC,Chlorinated HydroCarbon
Chem,Chemistry
CHM,Chemistry
CHO,Carbohydrate
Ci,Curie
CLC,Cross Linked Cellulose
Cm,Curium
cm,centimeter
CML,Chemical Markup Language
CN,Coordination Number
CN,Cyanide
CNO,Carbon Nitrogen Oxygen
CNP,Cyclic Nucleotide Phosphodiesterase
CNT,Carbon NanoTube
Co,Cobalt
CO,Carbon monoxide
CP,Chemically Pure
CP,Creatine Phosphate
CPA,CoPolymer Alloy
CPE,Chemical Potential Energy
Cr,Chromium
CR,Corrosion Resistant
CRAP,Crude Reagent And Products
CRC,Chemical Rubber Company
CRT,Cathode Ray Tube
Cs,Cesium
CSAC,Chemical Safety Analysis and Control
CSAD,Cysteine Sulfinic Acid Decarboxylase
CSTR,Continuously Stirred Tank Reactor
Cu,Copper
CVCS,Chemical Volume Control System
CW,Chemical Warfare
CWA,Chemical Warfare Agent
d,day
d,deci prefix (10-1)
D,Deuterium
D,Dilute
D-,Dextrorotatory
D2O,Deuterium Oxide or Heavy Water
da,deca prefix (101)
da,dalton
DAB,Diaminobenzidine
DAP,DiAmmonium Phosphate
dB,decibel
DB,Double Bond
Db,Dubnium
DDT,Dichloro Diphenyl Trichloroethane
DE,Dissociation Energy
DEC,Direct Evaporative Cooling
DEG,Degree
DEG,DiEthylene Glycol
DGA,Dissolved Gas Analysis
DHA,DocosaHexanoic Acid
DHMO,DiHydrogen MonOxide (water)
DHY,Dehydrate
DI,Diffusion Index
DIAPHOX,DIAmino PHosphine OXide
DIN,Dissolved Inorganic Nitrogen
DIP,Dissolved Inorganic Phosphate
DIW,De-Ionized Water
DLC,Dry Liquid Concentrate
DLS,Dynamic Light Scattering
DM,Dipole Moment
DM,Dry Matter
DMAE,DiMethyl Amino Ethanol
DMAP,4-DiMethylAminoPyridine
DMBP,DiMethyl BenzoPhenone
DME,DiMethyl Ether
DMG,DiMethyl Glycine
DMHg,DiMethyl mercury
DMK,DiMethyl Ketone
DMSO,DiMethyl SulfOxide
DMT,DiMethylTryptamine
DNA,DeoxyriboNucleic Acid
DOC,Dissolved Organic Compounds
DP,Differential Pressure
DP,Dry Process
DPM,Dynamic Proton Model
DQS,Discrete Quantum State
DRR,Double Replacement Reaction
DU,Depleted Uranium
Dy,Dysprosium
e–,electron
E,Energy
E,Exa- prefix (1018)
E1520,Propylene Glycol
EA,Epoxy Adhesive
EA,Ethyl Acetate
EAA,Ethylene Acrylic Acid
EAM,Embedded Atom Method
EAS,Electrophilic Aromatic Substitution
EB,Electrode Barrier
EBSD,Electron BackScatter Diffraction
EBT,Eriochrome Black T indicator
EC,Electron Capture
EC,Ethyl Carbonate
ECD,Electron Capture Detector
ECH,Enoyl-CoA Hydratase
EDI,Electrical De-Ionization
EDP,Ethylene Diamine Pyrocatehol
EDT,1,2-Ethane DiThiol
EDTA,Ethylene-Diamine-Tetra-Acetic acid
EE,Ether Extract
EEC,Equilibrium Equivalent Concentration
EEC,Evaporation Emission Control
EEEI,Effective Electron-Electron Interaction
EER,Equilibrium Exchange Rate
EET,Excitation Energy Transfer
EG,Ethylene Glycol
EGE,Ethylene Glycol Ether
EGO,Exhaust Gas Oxygen
EGR,Entropy Gradient Reversal
EGTA,Ethylene Glycol Tetraacetic Acid
EHF,Extremely High Frequency
EIC,Electromagnetically-Induced Chirality
ELF,Extremely Low Frequency
EM,ElectroMagnetic
EM,Elevated Moisture
EMA,Ethylene Methacrylic Acid
EMF,ElectroMotive Force
EN,Ethylene Naphthalate
EOF,ElectroOsmotic Flow
EP,Ethylene Polypropylene
EPA,Environmental Protection Agency
EPD,End Point Dilution
EPDM,Ethyl Propyl Diene Monomer
EPH,Extractable Petroleum Hydrocarbons
EPI,EPInephrine
Eq,Equivalent
Er,Erbium
ERW,Electrolyzed Reduced Water
Es,Einsteinium
ES,Excited State
ETOH,EThyl Alcohol
Eu,Europium
EV,Exceptional Vacuum
EVA,Ethylene Vinyl Acetate
EVOH,Ethylene Vinyl Alcohol
f,femto prefix (10-15)
F,Fluorine
FA,Fully Amorphous
FA,Furnace Annealing
FAC,Free Available Chlorine
FAD,Flavin Adenine Dinucleotide
FADE,Fast Atomic Density Evaluation
FAN,Free Amino Nitrogen
FAS,Fluorescence Actin Staining
FAS,Folic Acid Synthesis
FBC,Fesser, Bishop and Campbell model
FBD,Free Body Diagram
FBR,Fast Breeder Reactor
FC,Face Cell
FC,Face Centered
FC,Fragment Crystallization
FCC,Face Centered Cubic
FCC,Fluid Catalytic Cracking
FCC,Food Chemical Codex
FCCU,Fluidized Catalytic Cracking Unit
FCHC,Face Centered Hyper-Cubic
FCS,Fellow of the Chemical Society
FCS,Fire Control System
FCS,Fluorescence Correlation Spectroscopy
FE,Ferredoxin
FE,Free Energy
Fe,Iron
FGC,Flue Gas Conditioning
FIGD,Flow Injection/Gas Diffusion
FIGE,Field Inversion Gel Electrophoresis
FIPS,Fast Imaging Plasma Spectrometer
Fm,Fermium
FOS,FructoOligoSaccharide
FP,Freezing Point
FPD,Freezing Point Depression
FPLC,Fast Performance Liquid Chromatography
Fr,Francium
FRAP,Fluorine-Resistant Acid Phosphatase
FRS,Fellow of the Royal Society
FS,Free State
FSA,Formamidine Sulphinic Acid
FW,Formula Weight
G,Gauss
G,Gibbs Free Energy
G,Giga prefix (109)
G,Glycine g,gram
G,Guanosine
Ga,Gallium
Ga,Gauge
GABA,Gamma-AminoButyric Acid
GAD,Glutamate Decarboxylase
GAG,Glycosaminoglycan
GBB,Gas Blow Back
GC,Geiger Counter
GCC,Global Carbon Cycle
GCC,Global Climate Change
GCC,Glucocorticoid
GCC,Guanylyl Cyclase C
GCMS,Gas Chromatographic Mass Spectrometer
Gd,Gadolinium
GDP,Guanosine DiPhosphate
GE,Genetic Engineering
Ge,Germanium
GE,Group Element
Gel,Gelatin
GEM,Genetically Engineered Microorganism
GEP,Good Engineering Practice
GER,Gains Electrons,Reduction
GFM,Gram Formula Mass
GFW,Gram Formula Weight
GHB,Gamma-Hydroxy Butyrate
GI,Galvanized Iron
GI,Glycemic Index
GLA,GaLactosidase Alpha
GLA,Gamma-Linolenic Acid
GLA,Gamma-caroxyglutamic Acid
GLC,Gas Liquid Chromatography
Glc,Glucose
Glk,Glucokinase
GM,Geiger-Mueller tube
GMM,Gram Molecular Mass
GP,Gas Phase
GP,Glycerate 3-Phosphate
GP,GlycoProtein
GPC,Gel Permeation Chromatography
GS,Guanosine Synthetase
GT,Greater Than
GTL,Gas To Liquid
GTN,Glyceryl TriNitrate
Gy,Gray (radiation unit)
H,Enthalpy
h,hecto prefix (102)
H,Hydrogen
h,Planck’s constant
h,convection heat transfer coefficient
Ha,Hahnium (initial name for dubnium)
HA,Hemagglutinin
HAA,HaloAcetic Acid
HAc,Acetic Acid
HAc,Acetaldehyde
HACCP,Hazard Analysis and Critical Control Points
HAP,Hazardous Air Pollutant
HAS,Helium Atom Scattering
HAS,HyAluronan Synthase
HAT,Hypoxanthine, Aminopterin, Thymidine
HAZMAT,HAZardous MATerials
Hb,Hemoglobin
HB,Hydrogen Bonded
HBC,Hemoglobin C
HBCD,HexaBromoCycloDodecane
HBD,Hydrogen Bond Donor
HC,HydroCarbon
HCA,HydroxyCitric Acid
HCA,HydroxyCarbonate Apatite
HCB,HexaChloroBenzene
HCFC,HydroChloroFluoroCarbon
HDA,High Density Amorphous ice
HDA,HydroxyDecanoic Acid
HDI,Hexamethylene DiIsocyanate
HE,Hektoen Enteric agar
He,Helium
HE,High Explosive
HEA,Hektoen Enteric Agar
HEK,HEKtoen enteric agar
HEL,High Energy Laser
HEMA,HydroxyEthylMethAcrylate
HEP,Half Equivalence Point
HEPA,High-Efficiency Particulate Air
HEPH,Heavy Extractable Petroleum Hydrocarbons
HEU,Highly Enriched Uranium
Hf,Hafnium
HF,Hartree-Fock Method
HF,Heat Flux
HF,High Frequency
HF,Hydrogen Fuel
HFA,HydroFluoroAlkane
HFB,HexaFluoroBenzene
HFC,HydroFluoroCarbon
HFLL,Half-Filled Landau Level
HFP,HexaFluoroPropylene
Hg,Mercury
Hgb,Hemoglobin
HHV,High Heating Value
HIC,Household And Industrial Chemical
HL,Half-Life
HL,Hydrogen Line
HLA,HyaLuronic Acid
HLB,Helium Light Band
HMF,HydroxyMethyl Furfural
HMW,High Molecular Weight
Ho,Holmium
HO,Hydroxyl radical
HOAc,Acetic Acid
HOMO,Highest Occupied Molecular Orbital
HOQS,Highest Occupied Quantum State
HP,High Pressure
hp,horsepower
HPHT,High Pressure/High Temperature
HPLC,High Pressure Liquid Chromatography
HPPT,High Pressure Phase Transformation
HPSV,High Pressure Sodium Vapor
Hr,Hour
HRA,Health Risk Assessment
Hs,Hassium
HS,Hidden States
HSAB,Hard and Soft Acids and Bases
HSV,High Shear Viscosity
HT,Heat Transport
HT,Heat Treated
HT,High Temperature
HTC,Heat Transfer Coefficient
HTGR,High Temperature Gas Reactor
HTH,High Test Hypochlorite
HTS,High Temperature Superconductor
HTST,High Temperature/Short Time
HV,High Viscosity
HV,High Voltage
HVLP,High Volume/Low Pressure
HY,High Yield
Hz,Hertz
HZT,HydroChloroThiazide
I,electrical current
I,Iodine
I,Isoleucine
IAEA,International Atomic Energy Agency
IAQ,Indoor Air Quality
IB,Ion Balance
IC,Ice Crystals
ICE,Initial, Change, Equilibrium
ICE,Internal Combustion Engine
ICP,Inductively Coupled Plasma
ICSC,International Chemical Safety Card
ICSD,Inorganic Crystal Structure Database
ICSN,Institut de Chimie des Substances Naturelles
IE,Inert Electrolyte
IE,Ionization Energy
IEA,International Energy Agency
IG,Inert Gas
iHOP,information Hyperlinked Over Proteins
i.i.d.,independent and identically distributed
IK,Inverse Kinematics
IMBR,Immersed Membrane BioReactor
IMF,InterMolecular Force
IMS,Industrial Methylated Spirit
In,Indium
InChI,International Chemical Identifier
IOC,InOrganic Contaminant
IOCB,Institute of Chemistry and Biochemistry
IOCM,International Organic Chemistry Meeting
IPA,IsoPropyl Alcohol
IQ,Iron Quality
IR,Incident Report
IR,InfraRed
IR,Ionizing Radiation
Ir,Iridium
IRM,Interference Reflection Microscopy
ISI,Initial State Interaction
ISI,In-Situ Interfermometer ISM,Industrial, Scientific, or Medical
IUPAC,International Union of Pure and Applied Chemistry
J,Joule
JAC,Journal of Analytical Chemistry
JAW,Just Add Water
JBC,Journal of Biological Chemistry
JCG,Journal of Crystal Growth
JCS,Journal of the Chemical Society
JOC,Journal of Organic Chemistry
k,Boltzmann constant
K,Karat
K,Kelvin
k,kilo prefix (102)
K,Potassium
Ka,Acid dissociation constant
Kd,Dissociation constant
KE,Kinetic Energy
Keq,Equilibrium constant
kg,kilogram
KGA,KetoGlutaric Acid
kHz,kilohertz
km,kilometer
KMT,Kinetic Molecular Theory
Kr,Krypton
KTM,Kinetic Thermal Mixing
kW,kilowatt
L,azimuthal quantum number
L,Length
L,Leucine
L,Inductance
L,liter
L,luminosity
Li,Lithium
LIBS,Laser Induced Breakdown Spectroscopy
LiP,Lithium Polymer battery
Liq,Liquid
LLD,Liquid Level Detection
LLE,Liquid-Liquid Equilibrium
LLNL,Lawrence Livermore National Laboratory
LMA,Low Moisture Absorption
LME,Liquid Metal Embrittlement
LMH,Liquid Hydrogen
LN,Liquid Nitrogen
ln,natural logarithm
LNG,Liquid Natural Gas
LO,Localized Orbitals
LOD,Loss On Drying
LOQ,Limit Of Quantification
LOX,Liquid Oxygen
LP,Liquid Petroleum
LP,Liquid Propane
LPA,Liquid Pressure Amplifier
LPG,Liquid Petroleum Gas
Lq,Liquid
Lqd,Liquid
Lr,Lawrencium
LSE,Low Surface Energy
LSD,Lysergic Acid Diethylamide
LT,Less Than
Lt,light
LT,Low Temperature
LTE,Local Thermodynamic Equilibrium LTG,Liquid To Gas
LTOEL,Long Term Occupational Exposure Limit
Lu,Lutetium
LUMO,Lowest Unoccupied Molecular Orbital
LV,Low Volatility
LVS,Large Volume Sampler
Lw,Lawrencium (Changed to Lr) LWC,Light Water Content
LWG,Liquid Water in Grams
M,concentration (Molarity)
m,mass
M,Mega prefix (106)
m,meter
M,Methyl
m,Milli prefix (10-3)
M,Molar
M,Molecule
M3/H,Cubic Meters per Hour
mA,milliampere
MAC,Mobile Analytical Chemical
MADG,Moisture Activated Dry Granulation
MAM,Methyl Azoxy Methanol
MASER,Microwave Amplification by Stimulated Emission of Radiation
MAX,MAXimum
mbar,millibar
MBBA,N-(4-MethoxyBenzylidene)-4-ButylAniline
MC,MethylCellulose
MCA,Multi Channel Analyzer
MCL,Maximum Contaminant Level
MCR,MultiComponent Reaction
MCT,Medium Chain Triglyceride
MCT,MonoCarboxylate Transporter
Md,Mendelevium
MDA,MethyleneDiAniline
MDCM,Mechanistically Defined Chemical Mixtures
MDI,Methylene Diphenyl diIsocyanate
MDMA,MethyleneDioxy-MethylAmphetamine
MDQ,Minimum Daily Quantity
me,mass of an electron
ME,Materials Engineering
ME,MEthyl group
MEE,Minimum Explosive Energy
MEG,MonoEthylene Glycol
MEL,MethylEthylLead
MES,MethylEthylSulfate
MeV,Million electronVolt or MegaelectronVolt
MF,Methyl Formate
MF,Micro Fiber
MFG,Molecular Frequency Generator
MFP,Maximum Freezing Point
MFP,Molecular Free Path
MFP,MonoFluoroPhosphate
Mg,Magnesium
mg,milligram
MGA,Modular Gas Analyser
MH,Metal Halide
MH,Methyl Hydroxide
MHz,MegaHertz
MIBK,MethylIsoButylKetone
MIDAS,Molecular Interactions Dynamics And Simulations
MIG,Metal Inert Gas
MIN,MINimum
min,minutes
MIT,MethylIsoThiazolinone
MKS,Meter-Kilogram-Second
MKSA,Meter-Kilogram-Second-Ampere
mL or ml,milliliter
ML,Mono Layer
mm,millimeter
MM,Molar Mass
mmHg,millimeters of mercury
Mn,Manganese
MNT,Molecular NanoTechnology
MO,Molecular Orbital
Mo,Molybdenum
MOAH,Mineral Oil Aromatic Hydrocarbon
MOH,Measurement of Hardness
mol,mole
MOL,molecule
MP,Melting Point
MP,Metal Particulate
MPD,2-Methyl-2,4-PentaneDiol
MPD,m-PhenyleneDiamine
MPH,Miles Per Hour
MPS,Meters Per Second
Mr,Relative Molecular mass
MRT,Mean Radiant Temperature
MS,Mass Spectrometry
ms,millisecond
MSDS,Material Safety Data Sheet
MSG,MonoSodium Glutamate
Mt,Meitnerium
MTBE,Methyl Tert-butyl Ether
MW,MegaWatt
mW,MilliWatt
MW,Molecular Weight
MWCNT,Multi-Walled Carbon NanoTube
MWCO,Molecular Weight CutOff
MWM,Molecular Weight Marker
n,nano prefix (10-9)
n,neutron
n0,neutron
n,neutron emission
N,Newton
N,Nitrogen
N,Normal (concentration)
n,number of moles
NA,Avogadro constant
NA,Not Active
NA,Nucleic Acid
Na,Sodium
NAA,N-AcetylasPartate
NAA,Naphtalic Acetic Acid
NAC,Naphthenic Acid Corrosion
NAD+,Nicotinamide Adenine Dinucleotide
NADH,Nicotinamide Adenine Dinucleotide,Hydrogen (reduced)
NADP,Nicotinamide Adenine Dinucleotide Phosphate
NAS,National Academy of Science
Nb,Niobium
NBC,Nuclear, Biological, Chemical
NBO,Natural Bond Orbital
NCE,New Chemical Entity
NCEL,New Chemical Exposure Limit
NCR,No Carbon Required
NCW,National Chemistry Week
Nd,Neodymium
Ne,Neon
NE,Non Equilibrium
NE,Nuclear Energy
NG,Natural Gas
NHE,Normalized Hydrogen Electrode
Ni,Nickel
NIH,National Institutes of Health
NiMH,Nickel Metal Halide
NIST,National Institute of Standards and Technology nm,nanometer
NM,Non Metal
NMR,Nuclear Magnetic Resonance
NNK,Nicotine-derived Nitrosamine Ketone
No,Nobelium
NOAA,National Oceanic and Atmospheric Administration
NORM,Naturally Occurring Radioactive Material
NOS,Nitrous Oxide
NOS,Nitric Oxide Synthase
NOx,Nitrogen Oxides
Np,Neptunium
NR,Not Recorded
NS,Not Significant
NU,Natural Uranium
NV,Non-Volatile
NVC,Non-Volatile Chemical
NVOC,Non–Volatile Organic Chemical
NW,Nuclear Weapon
O,Oxygen
O3,Ozone
OA,Oleic Acid
OAA,OxaloAcetic Acid
OAc,Acetoxy functional group
OAM,Orbital Angular Momentum
OB,Oligosaccharide Binding
OC,Organic Carbon
OD,Optical Density
OD,Oxygen Demand
ODC,Ornithine DeCarboxylase
OER,Oxygen Enhancement Ratio
OF,Oxygen Free
OFC,Oxygen Free Copper
OFHC,Oxygen Free High thermal Conductivity
OH,alcohol
OH,hydroxide
OH,hydroxyl functional group
OI,Oxygen Index
OILRIG,Oxygen Is Losing,Reduction Is Gaining
OM,Organic Matter
ON,Oxidation Number
OP,Organophosphate
OQS,Occupied Quantum State
OR,Oxidation-Reduction
ORNL,Oak Ridge National Laboratory
ORP,Oxidation-Reduction Potential
ORR,Oxidation-Reduction Reaction
Os,Osmium
OSHA,Occupational Safety and Health Administration
OSL,Optically Stimulated Luminescence
OTA,OchraToxin A
OV,Organic Vapor
OVA,Organic Vapor Analyser
OVA,OVAlbumin
OWC,Oil-Water Contact
OX,oxygen
OX,Oxidation
OXA,OXanilic Acid
OXT,OXyTocin
OXY,Oxygen
P,Peta prefix (1015)
P,Phosphorus
p,pico prefix (10-12)
P,Pressure
P,Proton
p+,Proton
PA,Phosphatidic Acid
Pa,Pascal
Pa,Protactinium
PA,Proton Affinity
PA #,PolyAmide polymer number
PAA,PolyAcrylic Acid
PABA,ParaAminoBenzoic Acid
PAC,Pharmaceutically Active Compound
PAC,Polycyclic Aromatic Content
PAC,Powdered Activated Carbon
PAEK,PolyArylEtherKetone
PAGE,PolyAcrylamide Gel Electrophoresis
PAH,Polycyclic Aromatic Hydrocarbon
PAI,PolyAmide Imide
PAO,PolyAlphaOlefin
PASA,PolyAmide, Semi-Aromatic
Pb,Lead
PB,PolyButylene
PBB,PolyBrominated Biphenyl
PBD,PolyButaDiene
PBI,PolyBenzImidazole
PBN,PolyButylene Naphthalate
PBS,Phosphate Buffered Saline
PBT,PolyButylene Terephthalate
PC,PolyCarbonate
PC,Pyruvate Carboxylase
PCA,Pyrrolidone Carboxylic Acid
PCC,Pyridine Chloro Chromate
PCE,Tetrachloroethylene
PCR,Polymerase Chain Reaction
PCV,Pressure Control Valve
Pd,Palladium
PD,Positive Displacement
PD,Potential Difference
PE,PhycoErythrin
PE,Polyethylene
PE,Potential Energy
PEA,PolyEster Amine
PEEK,PolyEtherEtherKetone
PEG,PolyEthylene Glycol
PEK,Poly Ether Ketone
PEL,Permissible Exposure Limit
PERC,Tetrachloroethylene
PES,PolyEtherSulfone
PET,PolyEthylene Terephthalate
PETP,PolyEthyleneTerePhthalate
PEX,Cross-linked PolyEthylene
PFC,Perfluorocarbon
pg,picogram
PG,Propylene Glycol
PG,Prostaglandin
PGA,3-PhosphoGlyceric Acid
PGA,PolyGlutamic Acid
PGE,Platinum Group Elements
PGM,Platinum Group Metals
pH,measurement of H+ ions in aqueous solution
PH,Phenol functional group
PHA,PolyHydroxyAlkanoate
PHB,PolyHydroxyButyrate
PHC,Petroleum HydroCarbon
PHMB,PolyHexaMethyleneBiguanide
PHT,PHThalate
PI,Phosphate Ion
PI,PolyImide
PIB,PolyIsoButylene
pK,measurement of the dissociation constant
PLA,Polymerized Lactic Acid
PLC,PhosphoLipase-C
PM3,Parameterized Model number 3
PM10,Particulates smaller than 10 μm.
PM,Particulate Matter
PM,Photo Multiplier
pm,picometer
PM,Plasma Membrane
PM,Powder Metallurgy
Pm,Promethium
PMA,PhosphoMolybdic Acid
PMA,PolyMethyl Acrylate
PMID,PubMed IDentifier
PMMA,PolyMethylMethAcrylate
PMO,PolyMethylene Oxide
PNPA,PolyNucleotide Phosphorylase A
PNPB,PolyNucleotide Phosphorylase B
Po,Polonium
POC,Polar Organic Contaminant
pOH,measurement of OH- ions in aqueous solution
POL,Petroleum, Oils, and Lubricants
POP,Persistent Organic Pollutant
PORC,Porcelain
PPA -PhenylPropanolAmine
PPA,PolyPhthalAmide
PPB,Parts Per Billion
PPM,Parts Per Million
PPO,PolyPhenylene Oxide
PPS,PolyPhenylene Sulfide
PPT,Parts Per Trillion
PPT,PolyPyrimidine Tract
PPT,Precipitate
Pr,Praseodymium
PRV,Pressure Relief Valve
PSI,Pounds per Square Inch
PSV,Pressure Safety Valve
Pt,Platinum
PTFE,PolyTetraFluoroEthylene
Pu,Plutonium
PU,PolyUrethane
PV,Parity Violation
PV,Pressure Volume
PVC,PolyVinyl Chloride
PVT,Pressure, Volume, Temperature
PXY,Para-XYlene
Q,Heat energy
QA,Quinolinic Acid
QC,Quality Control
QCD,Quantum ChromoDynamics
QED,Quantum ElectroDynamics
QED,Quod Erat Demonstradum (Latin for “which was to be demonstrated”)
QM,Quantum Mechanics
QS,Quantum State
QS,Quantum Sufficit (Latin for “as much as needed”)
qt,quart
QW,Quit Whining
QY,Quantum Yield
°R,degrees Rankine
R,Arginine amino acid
R,Chiral center for R/S system
R,functional group or side chain of atoms variable
R,Resistance
R,Ideal Gas Constant
R,Reactive
R,Redux
R,Röntgen unit
R,Rydberg Constant
R-#,Refrigerant number
Ra,Radium
RA,Retinoic Acid
RACHEL,Remote Acess Chemical Hazards Electronic Library
rad,radian
rad,Radiation,Absorbed Dose
Rad,Radioactive
Rb,Rubidium
RBA,Rutherford Backscattering Analysis
RBD,Refined, Bleached and Deodorized
RCS,Reactive Chemical Species
RDA,Recommended Daily Allowance
RDT,Recombinant DNA Technology
RDX,cyclotrimethylenetrinitramine
RDX,Research Department Explosive
RE,Rare Earth
Re,Rhenium
REACH,Registration, Evaluation, Authorization, and restriction of CHemical substances
REE,Rare Earth Element
Ref,Reference
rem,Radiation Equivalent,Man
REM,Rare Earth Metal
REQ,Required
RER,Respiratory Exchange Ratio
RF,Radio Frequency
RF,Resonance Frequency
Rf,Rutherfordium
RFIC,Reagent-Free Ion Chromatography
RFM,Relative Formula Mass
RG,Rare Gas
Rg,Roentgenium
RH,Relative Humidity
Rh,Rhodium
RH,Rydberg Constant for Hydrogen
RHE,Reversible Hydrogen Electrode
RHIC,Relativistic Heavy Ion Collider
RHS,Right Hand Side
RI,Radical Initiator
RIO,Red IronOxide
RL,Reaction Level
RMM,Relative Molar Mass
RMS,Root Mean Square
Rn,Radon
RNA,RiboNucleic Acid
RNS,Reactive Nitrogen Species
RO,Red Oxide
RO,Reverse Osmosis
ROHS,Restriction Of Hazardous Substances
ROS,Reactive Oxygen Species
ROWPU,Reverse Osmosis Water Purification Unit
RPM,Revolutions Per Minute
RPT,Repeat
RSC,Royal Society of Chemistry
RT,Reverse Transcriptase
RT,Room Temperature
RT,Energy (Rydberg Constant x Temperature)
RTP,Room Temperature and Pressure
RTM,Read The Manual
RTSC,Room Temperature Super Conductor
Ru,Ruthenium
S,Entropy
s,seconds
S,Sulfur
s,solid
s,spin quantum number
SA,Salicylic Acid
SA,Surface Area
SAC,S-Allyl Cysteine
SAC,Strong Acid Cation
sal,salt (Latin)
SAM,S-Adenosyl Methionine
SAM,Spin Angular Momentum
SAN,Styrene-AcryloNitrile
SAP,Super Absorbent Polymer
SAQ,Soluable AnthraQunone
SAS,Small Angle Scattering
SATP,Standard Ambient Temperature and Pressure
Sb,Antimony
SB,Solvent Based
SBA,Strong Base Anion
SBC,Styrene Butadiene Copolymer
SBR,Sequencing Batch Reactor
SBS,Styrene Butadiene Styrene
Sc,Scandium
SC,Silicon Carbide
SCBA,Specific Chemical and Biologic Agents
SCC,Stress Corrosion Cracking
Sci,Science
SCO,Super Charged Oxygen
SCS,Single Crystal Silicon
SCU,SCoville Units
SCVF,Single Chamber Vacuum Furnace
SCW,Super Critical Water
SCX,Strong Cation eXchanger
SDMS,Scientific Data Management System
SDV,Shut Down Valve
SDW,Spin Density Wave
SE,Sample Error
Se,Selenium
Sec,Seconds
SCN,Thiocyanate
SEP,Separate
SEU,Slightly Enriched Uranium
SF,Safety Factor
SF,Significant Figures
SFC,Supercritical Fluid Chromatography
SFPM,Suspended Fine Particulate Matter
Sg,Seaborgium
SG,Specific Gravity
SG,Spheroidal Graphite
SH,Thiol functional group
SHE,Standard Hydrogen Electrode
SHF,Super High Frequency
SHC,Synthetic HydroCarbon
Si,Silicon
SI units,Système international d’unités (International System of Units)
SL,Sea Level
SL,Short Lived
SLI,Solid-Liquid Interface
SLP,Sea Level Pressure
Sm,Samarium
SM,Semi-Metal
SM,Standard Model
SMILES,Simplified Molecular Input Line Entry System
SN,Sodium Nitrate
Sn,Tin
SNAP = S-Nitroso-N-AcetylPenicillamine
SNP,Single-Nucleotide Polymorphism
sp,hybrid orbital between s and p orbitals
SP,Solubility Product
Sp,Special
SP,Starting Point
SPDF,atomic electron orbital names
SQ,squared
Sr,Strontium
SS,Solid Solution
SS,Stainless Steel
SSP,Steady State Plasma
STEL,Short Term Exposure Limit
STP,Standard Temperature and Pressure
STM,Scanning Tunneling Microscope
SUS,SUSpension
T,Period of a wave
T,Tera prefix (1012)
T,Thymine
t,time
T,Transition Metal
T,Tritium
Ta,Tantalum
TaC,Tantalum Carbide
TAC,Teiacetyl Cellulose
TAG,TriAcylGlyceride
tan,tangent
TAN,Total Acid Number
TAS,Total Analysis System
TAS,Total Alkali versus Silica
TAT,TriAcetone TriPeroxide
Tb,Terbium
TBA,TertButylArsine
TBA,2,4,6-TriBromoAnisole
TBP,True Boiling Point
TBC,4-TertButylCatechol
TBT,TriButylTin
TBHQ,TertButylHydroQuinone
Tc,Technitium
TC,Temperature Compensated
TC,Temperature Controlled
TC,Theoretical Chemistry
Tc,Critical Temperature
TCA,TauroCholic Acid
TCA,TCA cycle (citric acid cycle)
TCA,TriChloroAcetic Acid
TCE,TriChloroEthane
TCF,ThiolCarbon Fiber
TCM,TetraChloromethane
TCP,Thermal Conversion Process
TCP,Tocopherol
TCP,TriCalcium Phosphate
TCP,TriChloroPhenol
TCP,1,2,3-TriChloropropane
TCS,Toxic Chemical System
TCT,ToCoTrienol
TCV,Temperature Control Valve
TCVF -Two Chamber Vacuum Furnace
TD,Temperature Displacement
TD,Thermal Deposition
TDA,Thermal Dilatometric Analysis
TDC,Three Degrees Centigrade
TDG,ThymineDNA Glycosylase
TDI,Tolerable Daily Intake
TDI,Toluene DiIsonate
TDO,Tryptophan 2,3-DiOxygenase
TDP,Thermal DePolymerization
TDP,Thymidine DiPhosphate
TDP,Thiamine DiPhosphate
Te,Tellurium
TEA,Terminal Electron Acceptor
TEC,Thermal Electric Cooler
TEL,Tetra Ethyl Lead
TFM,Total Fatty Matter
Th,Thorium
THC,Tetra Hydra Cannabinol
THM,TriHaloMethanes
TI,Thermal Index
Ti,Titanium
TIC,Total Ion Current
TIMS,Thermal Ionization Mass Spectroscopy
TIP,TrisIsopropyl Phenyl
Tl,Thallium
TLC- Thin Layer Chromatography
TLV- Toxic Level Value
Tm,Thulium
TM,Transition Metal
TMD,Theoretical Maximum Density
TMG,TriMethylGlycine
TMMA,TetraMethylMalonAmide
TMP,TriMethylPhosphate
TMS,TriMethylSilane
TNB,TriNitroBenzene
TNT,TriNitroToluene
TNS,Test No Ether
TOBSY,Total ThroughBond Correlation Spectroscopy
TOC,Total Organic Carbon
TOI,Table Of Isotopes
TON,Table Of Nuclides
TOX,Toxic
TP,Triple Point
TP,Transition Point
TPE,ThermoPlastic Elastomer
TPM,Total Particulate Matter
TR,Table Row
TRAP,Tartrate Resistant Acid Phosphatase
TRFM,Time Resolved Fluorescence Microscopy
TRP,Tryptophan
TS,Temperature Sensitive
TSCB,TriSilaCycloButane
TSP,Thermally Stable Polycrystalline
TSP,TriSodium Phosphate
TSPM,Total Suspended Particulate Matter
TSS,Total Soluble Solids
TST,Transitional State Theory
TT,Test Tube
TTC,Triphenyl Tetrazolium Chloride
TTFD,Thiamine TetraHydroFurfurylDisulfide
TTLC,Total Threshold Limit Concentration
TTO,Total Toxic Organics
TTP,Thymine TriPhosphate
TTX,Tetrodotoxin
TU,Thermally Unbound
TWMC,Time Weighted Mean Concentration
TWV,Total Water Vapor
U,Internal Energy
U,Undetectable
U,Uranium
UAFM,Uranyl Acetate Fluorescence Method
UCK,Universal Chemical Key
UHF,Ultra High Frequency
UG,Undisturbed Gas UHC,Unburned HydroCarbons
UHMW,Ultra High Molecular Weight
UHP,Ultra High Pressure
UHP,Ultra High Purity
UHT,Ultra High Temperature
UHV,Ultra High Vacuum
ULG,Universal Liquid Gas
ULO,Ultra Low Oxygen
ULOQ,Upper Limit Of Quantitation
ULS,Ultra Low Sulfur
ULT,Ultra Low Temperature
UNK,UNKnown
UPW,Ultra Pure Water
UQY,Ultimate Quality and Yield
UUD,UnUnDuium (Element 112, now Cn)
UUH,UnUnHexium (Element 116)
UUP,UnUnPentium (Element 115)
UUQ,UnUnQuadium (Element 114)
UUS,UnUnSeptium (Element 117)
UUO,UnUnOctium (Element 118)
UUU,UnUnUnium (Element 111, now Rg)
UV,UltraViolet
UVA,UltraViolet band A
UV-A,UltravViolet band A
UVB,UltraViolet band B
UV-B,UltraViolet band B
UVF,UtraViolet Filter
UVL,UltraViolet Lamp
UVR,UltraViolet Reactive
UXS,Glucuronic Acid DeCarboxylase
UYQ,Uranium Yield Quantity
V,Vacuum
V,Valene
V,Vanadium
v,velocity
V,Volt
V,Volume
VA,Volume Analyzer
VA,Nitrogen group
VAC,Vacuum
VAC,Vacuum Assisted Closure
VB,Vacuum Break
VB,Valence Band
VBJ,Vacuum Bell Jar
VBT,Valence Bond Theory
VC,Viscous Coupled
VC,Vapor Cloud
VCE,Vapor Cloud Explosion
VC,Vinyl Chloride
VCM,Vinyl Chloride Monomer
Vd,Volume distribution
VDB,VanDyke Brown test
VDF,Van der Waals force
VDW,Van der Waals radius
VEQ,EQuilibrium Volume
VEQ,EQuivalence point Volume
VFn,Vertical Face number (n is a number)
VH,Vapor Hazard
VHH,Volatile Halogenated Hydrocarbon
VHI,Vapor Hazard Index
VHN,Vickers Hardness Number
VHP,Vaporized Hydrogen Peroxide
VHP,Very High Pressure
VHT,Very High Temperature
VHY,Very High Yield
VI,Viscosity Index
VLD,Vacuum Leak Detector
VLE,Vapor Liquid Equilibrium
VMD,Visual Molecular Dynamics
VO,Vacuum Oven
VOA,Volatile Organic Analysis
VOC,Volatile Organic Compound
VOL,Volume
VP,Vapor Point
VP,Vapor Pressure
VPE,Virtual Potential Energy
VR,Very Rapid
VS,Very Saturated
VS,Volatile Solid
VSC,Volatile Sulfur Compound
VSS,Volatile Suspended Solid
VTC,Variable Temperature Cutoff
VTP,Volume, Temperature, Pressure
VU,Volume Units
VV,Vacuum Vessel
VV,Valence-Valence
VW,Varies Widely
W,Tungsten
W,Tryptofan
W,Watt
W,wavelength
W,Weight
W,width
W,Work
W5,Which Was What We Wanted
WA,Weak Acid
WAC,Weak Acid Cation
WB,Water Based
WB,Weak Base
WB,Weak Bond
WBA,Weak Base Anion
WC,Water Cosolvent
WCS,Worst Case Scenario
WD,Water Dispersant
WD,Water Displacement
WD,Wet/Dry
WIAP,Water In All Phases
WIN,Water Insoluble Nitrogen
WNA,World Nuclear Association
WO,Weak Oxidizer
WP,White Phosphorus
WPS,Water Phase Salt
WR,Water Repellent
WS,Wash Solution
WS,Water Soluble
WSPI,Water-Soluble Phosphorous, Inorganic
WSPO,Water-Soluble Phosphorous, Organic
WSS,Water Soluble Stabilizer
WST,Weighted Settling Time
WSNZ,Water Soluble Zinc
WV,Water Vapor
WVDA,Water Vapor Diffusion Analysis
WVM,Water Vapor Monitor
WVN,Water Vapor Nitrogen
WVP,Water Vapor Permeability
WVT,Water Vapor Transport
WW,Waste Water
WWIX,Waste Water Ion eXchange
WYOL,Write Your Own Lab
WYOLA,Write Your Own Lab Assignment
WYU,What You Use
X,Halogen
X,unknown
XAG,Silver Troy Ounce
XAU,Gold Troy Ounce
XAN,XANthine
XDB,eXtra Dense Bonding
Xe,Xenon
XLS,Xenon Light Source
XOD,Xanthine Oxidase
XPD,Palladium Troy Ounce
XPT,Platinum Troy Ounce
XUM,X-ray Ultra-Microscope
XYD,XYliDine
Y,Tyrosine
y,yocto prefix (10-24)
Y,Yotta prefix (1024)
Y,Yttrium
YA,Yield Analysis
Yb,Ytterbium
YBCO,Yttrium Barium Copper Oxide
YAG,Yttrium Aluminum Garnet
YAP,Yield Analysis Pattern
YBG,Your Best Guess
YCC,American Chemical Society Younger Chemists Committee
Yd,Yard
YIC,Yttrium Lithium Fluoride
Yr,Year
YZN,Yellow ZiNc dichromate
Z,Atomic Number
Z,azimuth
Z,Impedance
Z,proton number
z,zepto prefix (10-21)
Z,zero
Z,Zetta prefix (1021)
Zn,Zinc
ZB,Zinc Blende
ZC,Zero Calibration
ZC,Zinc Composite
ZCG,Zeolite Crystal Growth
ZCR,Zinc Chromium
ZCS,Zinc Coated Steel
ZDC,Zero Degrees Kelvin
ZE,Zone Electrophoresis
ZEKE,Zero Electron Kinetic Energy
ZG,Zero Gravity
ZINC,Zinc Is Not Copper
ZK,Zero Kelvin
ZO,Zinc Oxide
ZP,Zero Pressure
Zr,Zirconium
ZRE,Zinc Responsive Element