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 Luckily, Kaavan’s testosterone levels waned on the eve of the flight. New York Times, "A Flying Elephant, a Teacher’s Hugs: 12 Tales of Pandemic Resilience," 24 Dec. 2020 On account of their elevated testosterone levels and androgenized bodies, males are generally stronger and faster than females; a fact reflected in the 10 to 30 percent performance gap in elite sports. The Editors, National Review, "Tulsi Gabbard Stands Up for Women’s Sports," 19 Dec. 2020 In a normal buck, as the days get shorter, testosterone levels rise which triggers the antlers to harden. Tony Kalna Jr., Outdoor Life, "The 22-Point, World-Record Doe," 16 Dec. 2020 Human Rights Watch called on World Athletics to immediately rescind its testosterone regulations. New York Times, "Rights Group Demands End to Sex Testing of Female Track Athletes," 4 Dec. 2020 And when the normal balance of estrogen, progesterone, and androgens (such as testosterone) is disrupted, this can cause symptoms such as irregular periods, acne, excess facial hair, hair loss, and fertility issues. Sarah Jacoby, SELF, "Keke Palmer Reveals She Has PCOS—and She Had to Fight for a Diagnosis," 2 Dec. 2020 She was then given testosterone at 17 and went on to have a double mastectomy at 20. Keira Bell, The Economist, "Keira Bell A court makes it harder to prescribe puberty blockers to children," 1 Dec. 2020 This is the story of that journey, accomplished via an aged Fiat camper van, tandem bike, kayak and any number of other improbable modes of transport that only make sense to people suffering from testosterone poisoning. Diana Gabaldon, Town & Country, "Diana Gabaldon's Foreword to Clanlands Reveals Behind-the-Scenes Stories from the Outlander Set," 3 Nov. 2020 In most parts of the country, the last week or so of October is the late pre-rut, when bucks are feeling a surge in testosterone but the main breeding has yet to occur. Scott Bestul, Field & Stream, "The 7 Best Days of the 2020 Whitetail Deer Rut," 20 Oct. 2020

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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Time Traveler for testosterone

Time Traveler

The first known use of testosterone was in 1935

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Statistics for testosterone

Last Updated

26 Dec 2020

Cite this Entry

“Testosterone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/testosterone. Accessed 16 Jan. 2021.

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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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