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

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

From New York Times • Dec. 22, 2016

A team representing Peter Pastorok’s funeral services from the Slovakian village of Kalna nad Hronom emerged as the winner.

From Seattle Times • Nov. 10, 2016

Should Apple be responsible for working conditions here in Usti nad Labem?

From Forbes • Nov. 8, 2013

Neud cur a lafur im wylofedd, Neud cerydd Dofydd, nad rhydd rhuddgledd.

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