nad

¹ American  

[nad] / næd /

noun

Slang: Vulgar.

1. Usually nads. a testicle.

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NAD ² American  

Biochemistry.

1. nicotinamide adenine dinucleotide: a coenzyme, C 2 1 H 2 7 N 7 O 1 4 P 2 , involved in many cellular oxidation-reduction reactions.

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N.A.D. ³ American  

abbreviation

1. National Academy of Design.

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NAD British  

noun

1. Former name: DPN.  biochem nicotinamide adenine dinucleotide; a coenzyme that is a hydrogen carrier in metabolic reactions, esp in tissue respiration

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NAD Scientific  

/ ĕn′ā-dē′ /

1. Short for nicotinamide adenine dinucleotide. A coenzyme that occurs in many living cells and functions as an electron acceptor. NAD is used alternately with NADH as an oxidizing or reducing agent in metabolic reactions. Chemical formula: C ₂₁ H ₂₇ N ₇ O ₁₄ P ₂ .

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Etymology

Origin of nad

First recorded in 1960–65; shortening of gonad ( def. )

Example Sentences

Nad ranem nad Polską można było zaobserwować tajemnicze rozbłyski.

From Los Angeles Times • Feb. 20, 2025

Several journalists from the Czech, German and French media were denied access to a news conference Orban and Babis held in the northern city of Usti nad Labem.

From Seattle Times • Oct. 6, 2021

Kvitova underwent nearly four hours of surgery on Tuesday at a specialized clinic in Vysoke nad Jizerou.

From New York Times • Dec. 22, 2016

My guess is that the Internet stays unregulated while still mandating open and fair access to consumers nad backbone connections.

From Forbes • Nov. 25, 2014

Nid yw Camden, er dysgedicced, diwytted, a manyled gwr ydoedd, ond ymleferydd am lawer o bethau yn ei Britannia; a hyny yn unig, o achos nad oedd yn medru yr iaith yn well. 

From Some Specimens of the Poetry of the Ancient Welsh Bards by Evans, Evan