N - Narcotism

N

1. Symbol for the element nitrogen. 2. normal (no longer in technical use). 3. neuraminidase.

n

1. Symbol for index of refraction. 2. nasal; number. 3. In statistics, sample size. 4. In the TNM system of cancer staging, the number of lymph nodes that have been invaded by a cancer.

¹⁵N

The symbol for the isotope of nitrogen with mass number 15; radioactive; atomic mass (weight) 15.

NA

nicotinic acid; Nomina Anatomica; not applicable; numerical aperture; nurse’s aide.

Na

[L. natrium] Symbol for the element sodium.

NAACCR

North America Association of Central Cancer Registries.

nab-

(nab) [Acronym of nanoparticle albumin bound] Bound by nanoparticles to albumin. Chemically linking some drugs to albumin increases their uptake by cells. Nanoparticle albumin-bound drugs have been used to increase the effectiveness of several cancer chemotherapeutic drugs.

NACBT

The National Association of Cognitive Behavioral Therapists.

N-acetyl-p-aminophenol

(ă-mē″nō-fē′nōl″, am″ĭ-nō-) ABBR: APAP. SEE: acetaminophen.

N-acetyl-p-benzoquinone imine

(ben″zō-kwĭn′ōn ĭ′mēn) C₈H₇NO₂, molecular weight 149.149. A toxic, chemical breakdown product of acetaminophen. It can cause serious liver injury or death when it accumulates in the body after acetaminophen overdose.

NaCl

Sodium chloride.

nacreous

(nā′krē-ŭs) [L. nacer, mother of pearl] Having an iridescent pearl-like luster, as bacterial colonies.

NAD

nicotinamide adenine dinucleotide; no appreciable disease.

NAD⁺

nicotinamide adenine dinucleotide, oxidized form.

NADH

nicotinamide adenine dinucleotide, reduced form.

nadir

(nā′dĕr) [Arabic] 1. A low point in any measurement. 2. The lowest concentration of blood cells (esp. white blood cells) found after taking a drug that suppresses the bone marrow. The term is usually used for the low blood cell counts that occur after cancer chemotherapy. When the absolute neutrophil count reaches a nadir below 1000 cells/mm³, the risk of life-threatening infections increases dramatically.

NADP⁺

nicotinamide adenine dinucleotide phosphate, oxidized form.

NADP

nicotinamide adenine dinucleotide phosphate.

NADPH

nicotinamide adenine dinucleotide phosphate, reduced form.

Naegele, Franz Carl

(nā′gĕ-lē) [German obstetrician, 1777–1851]

 N.’s obliquity. Anterior parietal presentation of the fetal head ...