n.
Pronunciation: tes- ' täs-t ə - ˌ r ō n
Function: noun
Etymology: test is + -o- + -sterone
Date: 1935
1 : a hormone that is a hydroxy steroid ketone C 19 H 28 O 2 produced especially by the testes or made synthetically and that is responsible for inducing and maintaining male secondary sex characters
2 : qualities (as brawn and aggressiveness) usually associated with males : MANLINESS