Wordnet 3.0
NOUN (1)
1.
a potent androgenic hormone produced chiefly by the testes;
responsible for the development of male secondary sex characteristics;
The Collaborative International Dictionary of English v.0.48:
Testosterone \Tes*tos"ter*one\ (t[e^]s*t[o^]s"t[~e]r*[=o]n), n.
[testes + o + sterone a steroid ketone.]
a steroid hormone (C19H28O2) produced mostly in the testes,
which is responsible for producing the secondary sexual
characteristics of males.
[PJC]
WordNet (r) 3.0 (2006):
testosterone
n 1: a potent androgenic hormone produced chiefly by the testes;
responsible for the development of male secondary sex
characteristics