pro·gen·i·tor

[proh-jen-i-ter]
noun
1.
a biologically related ancestor: a progenitor of the species.
2.
a person or thing that first indicates a direction, originates something, or serves as a model; predecessor; precursor: the progenitor of modern painting.

Origin:
1350–1400; Middle English < Latin prōgenitor the founder of a family. See pro-1, genitor

pro·gen·i·to·ri·al [proh-jen-i-tawr-ee-uhl, -tohr-] , adjective
pro·gen·i·tor·ship, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Progenitor is always a great word to know.
So is doohickey. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
progenitor (prəʊˈdʒɛnɪtə) [Click for IPA pronunciation guide]
 
n
1.  a direct ancestor
2.  an originator or founder of a future development; precursor
 
[C14: from Latin: ancestor, from pro-1 + genitor parent, from gignere to beget]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

progenitor
1382, from Anglo-Fr. progenitour (1347), O.Fr. progeniteur, from L. progenitorem (nom. progenitor) "ancestor," agent noun from progenitus, pp. of progignere (see progeny).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

progenitor pro·gen·i·tor (prō-jěn'ĭ-tər)
n.

  1. A direct ancestor.

  2. An originator of a line of descent.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Any critique that doesn't reference the progenitor misses the obvious.
Paleontologists can't tell how close any particular specimen was to the
  progenitor of the primates.
This, in turn, would be evidence of a common progenitor.
Cloning for reproduction would produce an identical twin younger than his or
  her progenitor.
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