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[tes-ti-kuh l] /ˈtɛs tɪ kəl/
Origin of testicle
late Middle English
First recorded in 1375-1425; late Middle English word from Latin word testiculus. See testis, -cle1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for testicle


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
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
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Word Origin and History for testicle

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."

Online Etymology Dictionary, © 2010 Douglas Harper
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testicle in Medicine

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

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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testicle in Science
Either of the testes of a male mammal together with the scrotum that contains it.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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