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Noun: progenitor  prow'je-ni-tu(r) or pru'je-ni-tu(r)
  1. An ancestor in the direct line; a forefather
    "She traced her family tree back to a progenitor who came on the Mayflower";
    - primogenitor

Derived forms: progenitors

Type of: ancestor, antecedent, ascendant, ascendent, root

Encyclopedia: Progenitor