[ tes-tis ]
See synonyms for: testistestes on Thesaurus.com

noun,plural tes·tes [tes-teez]. /ˈtɛs tiz/. Anatomy, Zoology.
  1. the male gonad or reproductive gland, either of the two oval glands located in the scrotum, commonly referred to as a testicle .: Compare ovary (def. 1).

Origin of testis

First recorded 1675–85; from Latin: “witness, spectator, testicle”; the sense “male gonad” is a loan translation from Greek parastátēs “bystander, supporter (at law),” in medical usage (in the dual and plural) “the (pair of) glands lying side by side, the testicles” (equivalent to para- para-1 + the combining form -statēs, from histánai “to make stand.”) Compare Greek prostátēs “one who stands in front, ruler,” in medical usage “the gland lying in front, the prostate

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British Dictionary definitions for testis


/ (ˈtɛstɪs) /

nounplural -tes (-tiːz)
  1. another word for testicle

Origin of testis

C17: from Latin, literally: witness (to masculinity)

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

Scientific definitions for testis


[ tĕstĭs ]

Plural testes (tĕstēz)
  1. The primary reproductive organ of male animals, in which sperm and the male sex hormones (androgens) are produced. In most vertebrates, the testes are contained inside the body. In many mammals, however, the testes are enclosed in an external scrotum.

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