testosterone

A white crystalline steroid hormone, C19H28O2, produced primarily in the testes and responsible for the development and maintenance of male secondary sex characteristics.

Any of several synthetic compounds that mimic the physiologic activity of testosterone, used as a drug in medical treatment and a doping agent by athletes.

A steroid hormone (C19H28O2) produced mostly in the testes, which is responsible for producing the secondary sexual characteristics of males.

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.