I. teˈstästəˌrōn noun
( -s )
Etymology: test is + -o- + ster ol + -one
: an androgenic hormone that is a crystalline hydroxy steroid ketone C 19 H 28 O 2 , is obtained especially from the testes of bulls or synthetically (as from cholesterol or diosgenin), and is used in medicine chiefly in the form of esters (as the propionate)
II. noun
: qualities (as brawn and aggressiveness) usually associated with males : manliness