tes‧tos‧ter‧one /teˈstɒstərəʊn $ -ˈstɑːstəroʊn/
noun [uncountable][
Date: 1900-2000;
Origin: testis + sterol ( ⇒ steroid) + -one]
the
hormone (=chemical produced by the body) in males that gives them their male qualities
[TahlilGaran] Dictionary of Contemporary English ▲