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Technical Glossaries




Guns and Ammo


Optical Microscopy


Glossary of Abbreviations

Select a letter below.
(# shows words starting with a digit or symbol.)

#  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z 

NAsparagine (amino acid)
N Newton
n. F. neuer Fassung
NaSodium (in a pharmaceutical compound)
NANeutron Activation
NANumerical Aperture
NANot applicable
NAItalian WWI term: chlorpicrin
NAA Neutron Activation Analysis
NAACP National Ass'n. for the Advancement of Colored People
NABTNational Association of Biology Teachers (US)
NACANational Advisory Council on Aeronautics (later NASA)
NAD Nicotinamide Adenine Dinucleotide
NADHNicotinamide Adenine Dinucleotide (Reduced)
NADPNicotinamide Adenine Dinucleotide Phosphate
NADPH Nicotinamide Adenine Dinucleotide Phosphate (Reduced)
NAE (US) National Academy of Engineering
NAFTA North American Free Trade Agreement
NAICSNoth American Industrial Classification System
Nal Naphthylalanine
NAMAS National Measurement Accreditation Service (England; lab accreditation)
NAMUR Normen-Arbeitsgemeinschaft fuer Mess- und Regeltechnik in der
NANAN-acetylneuraminic acid
NANDA New Animal Drug Application
NAPHCCNational Ass'n. of Plumbing, Heating and Cooling Contractors
NAPMNational Association of Purchasing Management
NARDNational Association of Retail Druggists (US)
NARTSNaval Air Rocket Test Station (Dover, NJ); LRPL after 1960
NASNew Active Substance (UK, pharmaceuticals)
NASNational Academy of Sciences (US)
NAS National Academy of Sciences (US)
NASBA Nucleic Acid Sequence Based Amplification
NASDNational Association of Securities Dealers
NASDAQNational Association of Securities Dealers Automated Quotations
NAV Net asset value
NBA National Basketball Association
NBCNuclear, Biological, Chemical (weapons)
NBC National Broadcasting Company
NBD N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)- (fluorescent substituent)
NBFMNarrow-Band Frequency Modulation
Nbg Norbornylglycine
NBS (U. S.) National Bureau of Standards (now NIST)
NBTNitroblue tetrazolium
NBV Net book value
NCNormally Closed (switch) (closed: current can flow)
NCChlorpicrin and tin tetrachloride (Engl. WWI chem. agent)
NCBINational Center for Biotechnology Information
NCCLS (US) National Committee for Clinical Laboratory Standards
NCDANational Center for Drug Analysis
NCE New Chemical Entity
NCHGR National Center for Human Genome Research
NCI National Cancer Institute
NCIBNational Collection of Industrial Bacteria (British)
NCN Nitro-Carbo-Nitrate
NCPFNational Collection of Pathogenic Fungi (British)
NCSNewborn calf serum
NCTCNational Collection of Type Cultures(microbiology) (British)
NCTRNational Center for Toxicological Research
NDA New Drug Application(US FDA)
NDT Nondestructive testing
NEA Nuclear Energy Agency
NEA National Educational Association (US teachers union)
NEC Nippon Electric Corporation
NEC National Electrical Code(US)
NEJMNew England Journal of Medicine
NELAC(US) Nat'l. Environmental Laboratory Accreditation Conference
NEMANational Electrical Manufacturers Association (US)
NEONNational Ecological Observatory Network
NESCNational Electrical Safety Code
NFNational Formulary (pharmaceutical ingredients)
NFL National Football League
NFPANational Fire Protection Association (US)
NGNational Guard
NGNo Good
NGFANational Grain and Feed Association
NGUNon-gonococcal urethritis
NHE Normal Hydrogen Electrode
NHLNon-Hodgkins lymphoma
NIAID National Institute of Allergy and Infectious Diseases
NIAMSDNat'l. Inst. of Arthritis and Musculoskeletal and Skin Diseases
NIBSCNational Institute of Biological Standards and Control (UK)
NICNetwork Information Center
NICHHDNat'l. Inst. of Child Health and Human Development
NICMOSNear Infrared Camera and Multi-Object Spectrometer
NIDDKDNat'l. Inst. of Diabetes and Digestive and Kidney Diseases
NIDDMNon-insulin-dependent Diabetes mellitus
NIDRNational Institute of Dental Research
NIEHS National Institute of Environmental Health Sciences
NIGMS National Institute of General Medical Sciences (US)
NIH National Institutes of Health (US)
NIH Not Invented Here
NIHCMNational Institute for Health Care Management
NIMBYNot in my back yard!
NIOSH National Institute of Occupational Safety and Health (US)
NIR Near Infrared
NISTNational Institute of Standards and Technology
Nle Norleucine
NLEANutrition Labeling and Education Act (1990, US)
NLO NonLinear Optics (or Optical)
NLRA National Labor Relations Act (US)
NLRBNational Labor Relations Board (US)
NLS Nonlinear Schrodinger Equation
NMCSNational military command system (US)
NMENew Molecular Entity
NMiNetherlands Measurement Institute
NMLRA National Muzzle-Loading Rifle Association (US)
NMR Nuclear Magnetic Resonance
NMRINuclear Magnetic Resonance Imaging
NNINational Nanotechnology Initiative
NNTPNetwork News Transfer Protocol(Internet)
NOChemical symbol for nitric oxide (not an abbreviation)
NONormally Open (switch) (open: current cannot flow)
NODNon-obese diabetic
NOECNo Effect Concentration
NOELNo Effect Limit
NOLNaval Ordnance Laboratory
NOS Not Otherwise Specified
NOTSNaval Ordnance Test Station, China Lake CA
NOX Nitrogen oxides (usually in air pollution context)
NPANational Pharmaceutical Alliance
NPFNurse Prescribers' Formulary (UK)
NPK Nitrogen, Phosphorus, Potassium (content in fertilizers)
NPNNormal Propyl Nitrate(rocket propellant candidate)
NPN Non-protein nitrogen
NPONothing by mouth(originally medical Latin)
NPS National Park Service
NPT National Pipe Thread
NPTNeomycin phosphotransferase
NPV Net Present Value
NRA National Rifle Association of America
NRA National Recovery Act (ca. 1932)
NRC National Research Council (US)
NRC Nuclear Regulatory Commission
NRENNational Research & Education Network (fiber optical system)
NRI National Research Initiative
NRV Net realizable value
NRZ Non-return to zero
NSAID Non-steroidal anti-inflammatory drug
NSB National Science Board (US)
NSERCNatural Science and Engineering Research Council (Canada)
NSFNational Science Foundation (US)
NSOMNear-field scanning optical microscopy
NSPCNational Standard Plumbing Code
NSSANational Skeet Shooting Association (US)
NSSFNational Shooting Sports Foundation (US)
NSTCNational Science and Technology Council
NTA Nitrilotriacetic acid
NTD Neural Tube Defects
NTISNational Technical Information Service
NTIS(U. S.) National Technical Information Service
NTP National Toxicology Program
NTSBNational Transportation Safety Board
NVHNoise, Vibration, Harshness (automobile)
NVLAP National Voluntary Laboratory Accreditation Program
NYSENew York Stock Exchange
NYUNew York University

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