1. nicotinamide adenine dinucleotide: a coenzyme, C21H27N7O14P2, involved in many cellular oxidation-reduction reactions.

  1. National Academy of Design.


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

n.also nads, 1980s, student slang shortening of gonad.

  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: C21H27N7O14P2.

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