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Testosterone

//tɛˈstɒ.stə.ɹəʊn// noun

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. countable, uncountable
"Mammalian testes contain almost no testosterone because it is sent out into the body as quickly as it is made."
2
a potent androgenic hormone produced chiefly by the testes; responsible for the development of male secondary sex characteristics wordnet
3
Manly behavior, often of an aggressive or foolishly reckless nature. countable, figuratively, uncountable
"Mother encouraged James to rely more on intelligence and less on testosterone to deal with the neighbor's son."

From test(is) + -o- + -sterone (“steroid hormone”).

Unscramble this word: testosterone