- the earliest ancestor of a family, race, etc.
- loosely an ancestor
Origin of primogenitorLate Latin from Classical Latin primus, first (see prime) + genitor, father from genitus, past participle of gignere: see genus
- The earliest ancestor.
- An ancestor or forebear.
Origin of primogenitorLate Latin prīmōgenitor Latin prīmō at first ( from prīmus first ; see per1 in Indo-European roots.)Latin genitor begetter ( from genitus ) ( past participle of gignere to beget ; see genə- in Indo-European roots.)
- An initial ancestor.