dihydrotestosterone
Concise Oxford English Dictionary © 2008 Oxford University Press:
dihydrotestosterone /dʌɪˌhʌɪdrəʊtɛsˈtɒstərəʊn/
▶noun Biochemistry a male sex hormone which is the active form of testosterone.
– origin 1950s: from dihydro- (in the sense ‘containing two hydrogen atoms in the molecule’) + testosterone.
'dihydrotestosterone' also found in these Oxford entries:

