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

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

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

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

Trí fuile ná dlegat frecor: fuil catha, ⁊ eóit, ⁊ etargaire. nad N etargaire N 155.

From The Triads of Ireland by Meyer, Kuno