testosterone

Noun

1. A steroid hormone that stimulates development of male secondary sexual characteristics, produced mainly in the testes, but also in the ovaries and adrenal cortex.
   • Mammalian testes contain almost no testosterone because it is sent out into the body as quickly as it is made. - 2019, Bill Bryson, The Body: A Guide for Occupants, Black Swan (2020), page 168:
   • The text recounts a 2011 experiment: Researchers tested 136 healthy young men’s testosterone levels, asked them about their political party affiliations, then gave them either a placebo or ten grams of AndroGel one...
2. Manly behavior, often of an aggressive or foolishly reckless nature.
   • Mother encouraged James to rely more on intelligence and less on testosterone to deal with the neighbor's son.
   • The MPS is a male orientated and misogynistic environment filled with testosterone, notches on bed posts and conquests. - 2023, Louise Casey, Baroness Casey of Blackstock, “9.2.5”, in Baroness Casey Review Final Report:...