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

Tatar, who was born in Ilava, Slovakia, but calls Dubnica nad Vahom his hometown, also knows injured Kraken goaltender Philipp Grubauer, a native of Germany.

From Seattle Times • Dec. 16, 2023

Previous military cargo sent into Ukraine by rail through Dobra and the nearby town of Cierna nad Tisou contained mostly ammunition and basic military hardware.

From New York Times • Apr. 14, 2022

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

From Forbes • Nov. 8, 2013

Neud caethiwed ced, nad rhydd cydwedd Nudd, Cadrwalch Ruffydd, brudd, breiddin tachwedd, Neud cwyn Beirdd trylwyn, meddw ancwyn medd, Neud cawdd im anawdd, menestr canwledd, Neud carchar anwar enwiredd Eingl-dud, Aerddraig Llan Rhystud funud fonedd.

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