testicle

noun

tes·​ti·​cle ˈte-sti-kəl 

: testis

especially : one of a higher mammal usually with its enclosing structures

testicular

te-ˈsti-kyə-lər 

adjective

Examples of testicle in a Sentence

Recent Examples on the Web

Researchers exposed male mouse testicle cells, known as TM3 cells, to a chemical that induces oxidative stress. — Samantha Agate, Sacbee.com, 29 July 2026

Sometimes low testosterone happens because the testicles aren’t functioning to their fullest potential. — Samantha Agate, Miami Herald, 28 July 2026

Immediate surgical repair is crucial to prevent permanent damage or loss of the testicle. — Bruce Y. Lee, Forbes.com, 26 July 2026

When external testosterone is introduced, the brain tells the testicles to stop producing their own hormones and sperm. — Sun Sentinel Editorial Board, Sun Sentinel, 25 July 2026

Word History

Etymology

Middle English testicule, from Latin testiculus, diminutive of testis

First Known Use

15th century, in the meaning defined above

Kids Definition

testicle

noun

tes·​ti·​cle ˈtes-ti-kəl 

: testis

Medical Definition

testicle

noun

tes·​ti·​cle ˈtes-ti-kəl 

: testis

especially : one with its enclosing structures