nad

1 of 2

noun (1)

ˈnad How to pronounce nad (audio)
variants or less commonly nard
ˈnärd How to pronounce nad (audio)
plural nads also nards
informal + impolite
: testis
—usually plural

NAD

2 of 2

noun (2)

ˌen-(ˌ)ā-ˈdē How to pronounce NAD (audio)
: a coenzyme C21H27N7O14P2 of numerous dehydrogenases that occurs in most cells and plays an important role in all phases of intermediary metabolism as an oxidizing agent or when in the reduced form as a reducing agent for various metabolites

called also nicotinamide adenine dinucleotide, diphosphopyridine nucleotide, DPN

Examples of nad in a Sentence

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Noun
Enter Singleton, a 32-year-old linebacker mature enough to captain a Super Bowl contender and disarming enough to, well, crack jokes about his nads. — Luca Evans, Denver Post, 28 May 2026
Noun
The formula is quite potent with 50 different peptides, retinol, coenzyme NAD, and adenosine—all wrinkle-reducing and anti-aging ingredients. — Essence Wiley, InStyle, 26 Aug. 2026 Caraway agreed to comply with the NAD’s recommendation to pull certain ads, but according to the complaint, many remained live and new ones appeared in January, just weeks before the suit was filed. — Catherina Gioino, Fortune, 19 May 2026 See All Example Sentences for nad

Word History

Etymology

Noun (1)

short for gonad

Noun (2)

nicotinamide adenine dinucleotide

First Known Use

Noun (1)

1964, in the meaning defined above

Noun (2)

circa 1962, in the meaning defined above

Time Traveler
The first known use of nad was circa 1962

Rhymes for nad

See All Rhymes for nad

Browse Nearby Words

nacrite
nad
NAD
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Cite this Entry

“Nad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nad. Accessed 4 Sep. 2026.

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Medical Definition

NAD

1 of 2 noun
ˌen-ˌā-ˈdē How to pronounce NAD (audio)
: a coenzyme C21H27N7O14P2 of numerous dehydrogenases that occurs in most cells and plays an important role in all phases of intermediary metabolism as an oxidizing agent or when in the reduced form as a reducing agent for various metabolites

called also diphosphopyridine nucleotide, DPN, nicotinamide adenine dinucleotide

NAD

2 of 2 abbreviation
no appreciable disease
Last Updated: - Updated example sentences
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