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 Now, a study is raising new doubts about this theory, finding no effect of testosterone on empathy in adult men. Eva Frederick, Science | AAAS, "Top stories: ‘Extreme male brain’ does not cause autism, a lost Maya city, and disappearing sharks," 6 Sep. 2019 Look at Hobbs & Shaw—then continue looking at it, for 135 testosterone-soaking, engine-revving minutes. Isaac Feldberg, Fortune, "Rise of the Super Sequel! As ‘It: Chapter Two’ Hits Theaters, Why Are Blockbusters Getting So Long?," 6 Sep. 2019 Bars in particular bothered Bird, who started testosterone two and a half years before changing his name and gender marker. Dan Stahl, NBC News, "Making a name for yourself: For trans people, it's 'life-changing'," 6 Sep. 2019 And because of testosterone, men’s skin is about 25 percent thicker with more sebum and hair follicles. Hana Hong, Marie Claire, "Can I Use My Boyfriend’s Moisturizer?," 30 Aug. 2019 Five years ago, the data linking oxybenzone to testosterone fluctuations in men and postmenopausual women was considered clinically insignificant. Jenna Rosenstein, Harper's BAZAAR, "Is Your Sunscreen Safe? The Case for Switching to a Mineral Sunscreen," 12 Aug. 2019 The complaint claimed Bates and the clinic administered testosterone him even though his levels were normal, and that the defendants routinely prescribed and sold hormones to patients when they were not medically indicated. Andrew Wolfson, The Courier-Journal, "25 Again clinic sued again — this time for not paying rent, lawsuit says," 1 Aug. 2019 But if the testosterone rules are upheld, Semenya’s choices are relatively few. New York Times, "Ruling Leaves Caster Semenya With Few Good Options," 31 July 2019 But that’s the world The Art of Self-Defense is describing: one where pure testosterone bubbles to the surface of every conversation and confrontation. David Sims, The Atlantic, "The Art of Self-Defense," 19 July 2019

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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Statistics for testosterone

Last Updated

5 Nov 2019

Time Traveler for testosterone

The first known use of testosterone was in 1935

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How to pronounce testosterone (audio)

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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