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[tes-tos-tuh-rohn] /tɛsˈtɒs təˌroʊn/
Biochemistry. the sex hormone, C 19 H 28 O 2 , secreted by the testes, that stimulates the development of male sex organs, secondary sexual traits, and sperm.
Pharmacology. a commercially prepared form of this compound, originally isolated from bull's testes and now also produced synthetically, used in medicine chiefly for treatment of testosterone deficiency and for certain gynecological conditions.
Origin of testosterone
1930-35; testo- (combining form of testis) + ster(ol) + -one Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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  • "We've managed to get some testosterone from a blond homunculus," he reported.

    The Sky Is Falling Lester del Rey
British Dictionary definitions for testosterone


a potent steroid hormone secreted mainly by the testes. It can be extracted from the testes of animals or synthesized and used to treat androgen deficiency or promote anabolism. Formula: C19H28O2
Word Origin
C20: from testis + sterol + -one
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 testosterone

male sex hormone, 1935, from German Testosteron (1935), coined from a presumed comb. form of Latin testis "testicle" (see testis) + ster(ol) (see steroid) + chemical ending -one.

Online Etymology Dictionary, © 2010 Douglas Harper
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testosterone in Medicine

testosterone tes·tos·ter·one (těs-tŏs'tə-rōn')
A steroid hormone and the most potent naturally occurring androgen that is formed by the interstitial cells of the testes, and possibly by the ovary and adrenal cortex, may be produced in nonglandular tissues from precursors such as androstenedione, and is used in the treatment of hypogonadism, cryptorchism, carcinomas, and menorrhagia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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testosterone in Science
A steroid hormone that is the most potent naturally occurring androgen and that regulates the development of the male reproductive system and male secondary sex characteristics. Testosterone is produced mainly in the testes and is also used as a drug in the treatment of certain medical disorders. Chemical formula: C19H28O2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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testosterone in Culture
testosterone [(tes-tos-tuh-rohn)]

A male hormone that governs secondary sex characteristics. It is produced in the testes.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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