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

After a tense meeting with a worried Brezhnev in Čierna nad Tisou, near Czechoslovakia’s border with the Soviet Union, in late July, Dubček failed to warn the population that an invasion might be imminent.

From The Guardian • Aug. 19, 2018

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

From New York Times • Dec. 22, 2016

Neud arwydd nam llwydd lledfryd im calon, Neud eres nad tonn honn ar ei hyd.

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