tes·​tos·​ter·​one | \ te-ˈstä-stə-ˌrōn How to pronounce testosterone (audio) \

Definition of testosterone

1 : a hormone that is a hydroxy steroid ketone C19H28O2 produced especially by the testes or made synthetically and that is responsible for inducing and maintaining male secondary sex characters
2 : qualities (such as brawn and aggressiveness) usually associated with males : manliness

Examples of testosterone in a Sentence

Recent Examples on the Web

The treatment consists of taking a medication to suppress or block the production of testosterone. Mike Cason | Mcason@al.com, al.com, "Alabama Gov. Kay Ivey signs ‘chemical castration’ bill into law," 10 June 2019 Specifically, chemicals like BPA, BPS, and phthalates are known to mimic hormones like estrogen, interfere with important hormone pathways in the thyroid gland, and inhibit the effects of testosterone. Julia Belluz, Vox, "Sperm counts are falling. This isn’t the reproductive apocalypse — yet.," 30 May 2019 Some people are also concerned that birth control with estrogen will mess with testosterone, but that isn't the case. Suzannah Weiss, Teen Vogue, "7 Things to Know About Birth Control If You Are Transgender or Nonbinary," 1 May 2019 But people have natural variations in their hormones, so WADA allows T/E ratios as high as 4-1, leading some athletes to top off with just enough testosterone to stay under that limit. Umair Irfan, Vox, "Olympic swimmer Ryan Lochte broke doping rules. It happens far more than you think.," 24 July 2018 Female Marines were injured at more than six times the rate of men during preliminary training—unsurprising, since men’s higher testosterone levels produce stronger bones and muscles. Heather Mac Donald, WSJ, "Women Don’t Belong in Combat Units," 13 Jan. 2019 The substance used in the study, DMAU, has properties similar to both androgens, such as testosterone, and progestins, such as progesterone. Mark Lieber, CNN, "Male birth control pill one step closer to reality, researchers say," 20 Mar. 2018 The Academy of Motion Picture Arts and Sciences is still mostly comprised of men, which means testosterone-laden films get the most Oscar buzz. Christopher Rosa, Glamour, "Lady Gaga Didn't Need A Star Is Born to Be Taken Seriously," 28 Sep. 2018 Genetics preclude a level playing field, and not just because some female athletes have more naturally occurring testosterone in their bodies. Ken Goe, OregonLive.com, "Kelly Sullivan returns to Oregon State as Seattle U's coach: Oregon track & field rundown," 28 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'testosterone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of testosterone

1935, in the meaning defined at sense 1

History and Etymology for testosterone

testis + -o- + -sterone

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Dictionary Entries near testosterone

test oath




test pattern

test pilot

test pit

Statistics for testosterone

Last Updated

18 Jun 2019

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Time Traveler for testosterone

The first known use of testosterone was in 1935

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English Language Learners Definition of testosterone

medical : a substance (called a hormone) that occurs naturally in men and male animals
informal + often disapproving : qualities (such as noticeable strength and aggressiveness) that agree with traditional ideas about what men are like


tes·​tos·​ter·​one | \ te-ˈstäs-tə-ˌrōn How to pronounce testosterone (audio) \

Medical Definition of testosterone

: a male hormone that is a crystalline hydroxy steroid ketone C19H28O2 produced primarily by the testes or made synthetically and that is the main androgen responsible for inducing and maintaining male secondary sex characteristics — see androgel, axiron

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Comments on testosterone

What made you want to look up testosterone? Please tell us where you read or heard it (including the quote, if possible).


to take the place or position of

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