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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.

NAD+ is often called a cell's "fuel regulator" because it plays a central role in producing energy, repairing DNA, and keeping cells working properly.

From Science Daily

However, NAD+ levels naturally decrease as people age.

From Science Daily

"Fine-tuning NAD+ metabolism holds promise for delaying age-related health decline as well as disease such as premature ageing diseases," says Dr. Jianying Zhang, one of the lead authors.

From Science Daily

"But to truly unlock its potential, we need to better understand the right doses, long-term safety, and interindividual variability in response to NAD+ augmentation strategies."

From Science Daily

The review examines years of laboratory research and clinical studies exploring ways to raise NAD+ levels.

From Science Daily