the biological father as distinguished from the pater or legal father
Word origin
C15: from Latin, from gignere to beget
genitor in American English
(ˈdʒenɪtər)
noun
a parent, esp. a father
Word origin
[1400–50; late ME ‹ L, equiv. to geni- (var. s. of gignere to beget) + -tor-tor; c. Gk genétōr, Skt janitar-]This word is first recorded in the period 1400–50. Other words that entered Englishat around the same time include: gallery, oblique, peg, separate, union