testosterone /tɛˈstɑːstəˌroʊn/ noun Learner's definition of TESTOSTERONE
[noncount]
1
medical : a substance (called a hormone) that occurs naturally in men and male animals ◊ Testosterone causes the development of the male reproductive system and characteristics of the adult male body.睾丸素，睾酮（促进男性生殖系统的发育和成年男性生理特征的形成）
2
informal + often disapproving : qualities (such as noticeable strength and aggressiveness) that agree with traditional ideas about what men are like大男子主义