testosterone
Pronunciation:
/tɛsˈtɒstəˌɹəʊn//tɛsˈtɒstəˌɹoʊn/noun
Definitions
Steroid hormone produced primarily in the testes of the male; it is responsible for the development of secondary sex characteristics in the male.
Manly behavior, often of an aggressive or foolishly reckless nature.
Example: Mother encouraged James to rely more on intelligence and less on testosterone to deal with the neighbor's son.