nad

1 of 2

noun (1)

ˈnad 

variants or less commonly nard

ˈnärd 

plural nads also nards

informal + impolite

: testis

—usually used in plural

NAD

2 of 2

noun (2)

ˌen-(ˌ)ā-ˈdē 

: 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

Recent Examples on the Web

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

Pre-auction estimates for the bottle’s price ranged between $70,000 nad $100,000. — David Thomas Tao, Forbes.com, 26 Jan. 2026

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

Rhymes for nad

• ad
• add
• bad
• brad
• cad
• clad
• dad
• fad
• gad
• glad
• grad
• had

Medical Definition

NAD

1 of 2 noun

ˌen-ˌā-ˈdē 

: 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