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nad

1 American  
[nad] / næd /

noun

Slang: Vulgar.
  1. Usually nads. a testicle.


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.


N.A.D. 3 American  

abbreviation

  1. National Academy of Design.


NAD British  

noun

  1. Former name: DPNbiochem nicotinamide adenine dinucleotide; a coenzyme that is a hydrogen carrier in metabolic reactions, esp in tissue respiration

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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 .


Etymology

Origin of nad

First recorded in 1960–65; shortening of gonad ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In 2017 Pimblett had suffered defeat by Nad Narimani for the Cage Warriors featherweight title, before losing to Soren Bak the following year when fighting for lightweight gold.

From BBC

In ads that run during his podcast with Kennedy, Brecka tells viewers about “healthier for you” chips, a weighted vest and an NAD+ supplement.

From The Wall Street Journal

They found that the brain's inability to maintain normal levels of a critical cellular energy molecule called NAD+ plays a major role in driving Alzheimer's.

From Science Daily

Importantly, maintaining proper NAD+ balance was shown to not only prevent the disease but also reverse it in experimental models.

From Science Daily

NAD+ levels naturally decline throughout the body, including the brain, as people age.

From Science Daily