progenitor
Americannoun
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a biologically related ancestor.
a progenitor of the species.
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a person or thing that first indicates a direction, originates something, or serves as a model; predecessor; precursor.
the progenitor of modern painting.
noun
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a direct ancestor
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an originator or founder of a future development; precursor
Other Word Forms
Etymology
Origin of progenitor
1350–1400; Middle English < Latin prōgenitor the founder of a family. See pro- 1, genitor
Explanation
While any ancestor can be a progenitor, or previous member of a family line, the word is usually applied to someone who was an originator of or major contributor to the characteristics of that line. The word progenitor can be traced to the Latin prōgignere, which means "to beget," and so is linked to the beginning of a genealogical line. The clue comes in the "gen" part, meaning "birth, procreation," and signifying the genetic contribution of an ancestor to a family line. Prō- means "forward," and the -tor suffix indicates someone doing an action — so a progenitor is someone who gives rise to a family line.
Vocabulary lists containing progenitor
It's All in the Family
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We the People: Gen
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Silent Spring
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But it began in 1993 with “Abraham,” progenitor of the Abrahamic religions and the co-star of “The Faithful.”
From Salon • Mar. 29, 2026
He could be the progenitor of a new look, a Christian Dior for the modern woman.
From Salon • Mar. 27, 2026
The ventricle-like regions inside the organoids, where progenitor cells gather and begin forming early nerve cells, were also much smaller.
From Science Daily • Dec. 17, 2025
As a result, apical progenitor cells were less able to renew themselves.
From Science Daily • Dec. 17, 2025
It makes the progenitor of all this group of insecticides, DDT, seem by comparison almost harmless.
From "Silent Spring" by Rachel Carson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
