Main Entry: tes·tis

Pronunciation: \ˈtes-təs\

Function: noun

Inflected Form(s): plural tes·tes \ˈtes-ˌtēz\

Etymology: Latin, witness, testis

Date: 1650

: a typically paired male reproductive gland that produces sperm and secretes testosterone and that in most mammals is contained within the scrotum at sexual maturity