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Dictionary

at•a•vism

Pronunciation: (at'u-viz"um), [key]
—n.
1. Biol.
a. the reappearance in an individual of characteristics of some remote ancestor that have been absent in intervening generations.
b. an individual embodying such a reversion.
2. reversion to an earlier type; throwback.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

atavic

atavistic

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