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Noun: primogenitor  ,prI-mow'je-ni-tu(r) or ,prI-mu'je-ni-tu(r)
  1. 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