testicle

[tes-ti-kuh l] /ˈtɛs tɪ kəl/
noun
1.
testis.
Origin
1375-1425; late Middle English < Latin testiculus. See testis, -cle1
British Dictionary definitions for testicle

testicle

/ˈtɛstɪkəl/
noun
1.
either of the two male reproductive glands, in most mammals enclosed within the scrotum, that produce spermatozoa and the hormone testosterone Also called testis
Derived Forms
testicular (tɛˈstɪkjʊlə) adjective
Word Origin
C15: from Latin testiculus, diminutive of testis testicle
Word Origin and History for testicle
n.

1590s, alteration of testicule (early 15c.), from Latin testiculus, diminutive of testis "testicle" (see testis). The Old English was herþan, probably originally "leather bag" (cf. heorþa "deer-skin"). The commonest slang terms for them in other languages are words that mean "balls," "stones," "nuts," "eggs."

testicle in Medicine

testicle tes·ti·cle (těs'tĭ-kəl)
n.
A testis, especially one contained within the scrotum.

testicle in Science
testicle
  (těs'tĭ-kəl)   
Either of the testes of a male mammal together with the scrotum that contains it.