[ N ]

• N  asparagine; Avogadro number; blood factor in the MNS blood group system; loudness; nasal; nasion; nausea; negative; neomycin; neper; nerve; neuraminidase; neurology; neuropathy; neutron number; newton; nicotinamide; nifedipine; nitrogen; nodule; normal [solution]; nucleocapsid; nucleoprotein; nucleoside; nucleus; number; number in sample; number of molecules; number of neutrons in an atomic nucleus; population size; radiance; refractive index; signal size; spin density
• N0  no breast tumor regional lymph nodes metastases [TNM (tumor-node-metastasis) classification]
• 0.02N  fiftieth-normal [solution]
• 0.1N  tenth-normal [solution]
• 0.5N  half-normal [solution]
• N1  breast tumor metastases to ipsilateral axillary lymph nodes [TNM (tumor-node-metastasis) classification]; normal subject
• N I-XII, N 1-12  first to twelfth cranial nerves
• 2N  double-normal [solution]
• N2  breast tumor metastases to ipsilateral axillary lymph nodes attached to each other or to other structures [TNM (tumor-node-metastasis) classification]
• N/2  half-normal [solution]
• N3  breast tumor metastases to ipsilateral internal mammary lymph nodes [TNM (tumor-node-metastasis) classification]
• N/10  tenth-normal [solution]
• N/50  fiftieth-normal [solution]
• n  amount of substance expressed in moles; born [Lat. natus]; haploid chromosome number; index of refraction; nerve; neuter; neutron; neutron night; number density; normal; nostril [Lat. naris]; number; number of density of molecule; principal quantum number; refractive index; rotational frequency; sample size
• n-  nano- [10^-9]
• 2n  haploid chromosome; diploid
• 3n  triploid
• 4n  tetraploid
• ν  see nu
• NA  Avogadro constant or number; nalidixic acid; Narcotics Anonymous; network administrator; neuraminidase; neurologic age; neutralizing antibody; neutrophil antibody; nicotinic acid; Nomina Anatomica; non-A [hepatitis virus]; nonadherent; noradrenalin; not admitted; not applicable; not available; nuclear antibody; nucleic acid; nucleoside analogue; nucleus ambiguus; numerical aperture; nurse's aide; nursing assistant; nursing auxiliary
• N/A  not applicable
• Na  Avogadro number
• nA  nanoampere
• NAA  N-acetyl aspartate; naphthaleneacetic acid; neutral amino acid; neutron activation analysis; neutrophil aggregation activity; nicotinic acid amide; no apparent abnormalities
• NAACCR  North American Association of Central Cancer Registries
• NAACLS  National Accrediting Agency for Clinical Laboratory Sciences
• NAACOG  Nurses Association of the American College of Obstetricians and Gynecologists
• NAA/Cr  N-acetyl aspartate/creatine [ratio]
• NA-AAF  N-acetoxy-N-acetylaminofluorene
• NAAP  N-acetyl-4-amino-phenazone
• NAAQS  national ambient air quality standard
• NAB  novarsenobenzene; neutralizing antibody
• NABP  National Association of Boards of Pharmacy
• NABPLEX  National Association of Boards of Pharmacy Licensing Examination
• NAC  N-acetylcysteine; National Asthma Center; National Audiovisual Center; neuroimaging analysis center; Noise Advisory Council
• NaC  sodium channel
• NACCHO  National Association of County and City Health Officials
• NACCT  North American Congress of Clinical Toxicology
• NaC/DEG  sodium channel and degenerin
• NACDS  North American Clinical Dermatological Society
• NACED  National Advisory Council on the Employment of the Disabled
• nAch  nicotinic acetylcholine
• NAcHPZ  4-N-acetyl hydrazinophthalazin-1-one
• nAChR  nicotinic acetylcholine receptor
• NACHRI  National Association of Children's Hospitals and Related Institutions
• NACI  New Applications for Coronary Interventions [registry]; New Approaches to Coronary Interventions [registry]
• NACI DCA  New Approaches to Coronary Interventions [registry] Directional Coronary Atherectomy [study]
• NACNEP  National Advisory Council for Nursing Education and Practice
• NACOR  National Advisory Committee on Radiation
• NACPTAR  North American Cerebral Percutaneous Transluminal Angioplasty Registration [study]
• Nacq  number of acquisitions
• NACS  neonate adaptive capacity to stimulus
• NACSAP  National Alliance Concerned with School-Age Parents
• NACT  National Alliance of Cardiovascular Technologists
• NAD  neutrophil actin dysfunction; new antigenic determinant; nicotinamide adenine dinucleotide; nicotinic acid dehydrogenase; no abnormal discovery; no active disease; no acute distress; no apparent distress; no appreciable disease; normal axis deviation; not done; nothing abnormal detected
• NAD⁺  oxidized nicotinamide adenine dinucleotide [NAD]
• NaD  sodium dialysate
• NADA  New Animal Drug Application
• NADABA  N-adenoxyldiaminobutyric acid
• NaDC  sodium dicarboxylate cotransporter
• NADG  nicotinamide adenine dinucleotide glycohydrolase
• NADH  reduced nicotinamide adenine dinucleotide
• NADL  National Association of Dental Laboratories
• NaDodSO₄  sodium dodecyl sulfate
• NADP  nicotinamide adenine dinucleotide phosphate
• NADP⁺  oxidized form of nicotinamide adenine dinucleotide phosphate
• NADPH  reduced nicotinamide adenine dinucleotide phosphate
• NADR  National Acquired Immunodeficiency Syndrome [AIDS] Demonstration Research; noradrenalin
• NADS  National Alcohol and Other Drugs Survey [Canada]
• NAE  net acid excretion
• NaE, Na_e  exchangeable body sodium
• NaE1ATP  sodium-enzyme-adenosine triphosphate [ATP] complex
• NAEL  no adverse effect level
• NAEMD  National Academy of Emergency Medical Dispatch
• NAEMSP  National Association of Emergency Medical Services Physicians
• NAEMT  National Association of Emergency Medical Technicians
• NAEP  National Asthma Education Program
• NAEPP  National Asthma Education and Prevention Program
• NaERC  sodium efflux rate constant
• NAF  nafcillin; National Amputation Foundation; National Ataxia Foundation; net acid flux; neural adaptive filter
• NAFD  Nager acrofacial dysostosis
• NAFEC  National Association of Freestanding Emergency Centers
• NAFTA  North American Free Trade Agreement
• NAG  N-acetyl-D-glucosaminidase; narrow-angle glaucoma; nonagglutinable
• NAGA  N-acetyl-alpha-D-galactosaminidase
• NAGO  neuraminidase and galactose oxidase
• NAGS  N-acetylglutamate synthetase
• NAH  2-hydroxy-3-naphthoic acid hydrazide
• NAHA  National Association of Health Authorities
• NAHC  National Advisory Heart Council
• NAHCS  National Association of Health Center Schools
• NAHDO  National Association of Health Data Organizations
• NAHG  National Association of Humanistic Gerontology
• NAHI  National Athletic Health Institute
• NAHMOR  National Association of Health Maintenance Organization Regulators
• NAHPA  National Association of Hospital Purchasing Agents
• NAHQ  National Association for Healthcare Quality
• NAHSA  National Association for Hearing and Speech Action
• NAHSE  National Association of Health Services Executives
• NAHU  National Association of Health Underwriters

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