Noun: primogenitor ,prI-mow'je-ni-tu(r) or ,prI-mu'je-ni-tu(r)
- An ancestor in the direct line; a forefather
"She traced her family tree back to a primogenitor who came on the Mayflower";
- progenitor
Derived forms: primogenitors
Type of: ancestor, antecedent, ascendant, ascendent, root
Encyclopedia: Primogenitor