testosterone

Plural: testosterones

Noun

• a potent androgenic hormone produced chiefly by the testes; responsible for the development of male secondary sex characteristics
• A steroid hormone that stimulates development of male secondary sexual characteristics, produced mainly in the testes, but also in the ovaries and adrenal cortex.
• Manly behavior, often of an aggressive or foolishly reckless nature.

Examples

• Mother encouraged James to rely more on intelligence and less on testosterone to deal with the neighbor's son.