genitor
Concise Oxford English Dictionary © 2008 Oxford University Press:
genitor /ˈdʒɛnɪtə/
▶noun Anthropology a person's biological father. Often contrasted with pater.
– origin ME: from OFr. geniteur or L. genitor, from the root of gignere ‘beget’.
'genitor' also found in these Oxford entries:

