the theory that the human race has descended from a single pair of individuals or a single ancestral type.

1860–65; mono- + -gen + -ism

monogenist, noun
monogenistic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

monogenism mo·nog·e·nism (mə-nŏj'ə-nĭz'əm)
The theory that all human beings are descended from a single pair of ancestors.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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