intromittent organ
Concise Oxford English Dictionary © 2008 Oxford University Press:
intromittent organ /ˌɪntrə(ʊ)ˈmɪt(ə)nt/
▶noun Zoology the male copulatory organ of an animal, especially a hermaphrodite.
– origin C19: from L. intromittent-, intromittere ‘introduce’, from intro- ‘to the inside’ + mittere ‘send’.
'intromittent organ' also found in these Oxford entries:

