fraternal twins

fraternal twin

noun
one of a pair of twins, not necessarily resembling each other, or of the same sex, that develop from two separately fertilized ova.
Compare identical twin.


Origin:
1900–05

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

fraternal twins pl.n.
Twins that derive from separately fertilized ova and that have different genetic makeup. They may be of the same or opposite sex.

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