testosterone
noun
the sex hormone C 19 H 28 O 2 , secreted by the testes, that stimulates the development of male sexual organs, secondary sexual traits, and sperm.
The grammatical form denoting more than one person, place, thing, or idea.
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That same study also found that 16.5 percent of elite male athletes had testosterones levels that fell below the "typical" range for men.
From The Verge ● May 22, 2015