Dictionary of Medical Acronyms & Abbreviations

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[ N ]

N₁ | N₂ | N₃ | N₄ | N₅ | N₆ | N₇ |

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