Definition of Atavesm
At`avism, name given to the reappearance in progeny of the features,
and even diseases, of ancestors dead generations before.
- Wikipedia
At"a*vism (&?;), n. [L. atavus an
ancestor, fr. avus a grandfather.] (a) The
recurrence, or a tendency to a recurrence, of the original type of a
species in the progeny of its varieties; resemblance to remote rather than
to near ancestors; reversion to the original form.
(b) (Biol.) The recurrence of any peculiarity
or disease of an ancestor in a subsequent generation, after an intermission
for a generation or two.
Now and then there occur cases of what physiologists call
atavism, or reversion to an ancestral type of character.
J. Fiske
- Webster's Unabridged Dictionary (1913)
- the reappearance of a characteristic in an organism after several generations of absence
- The Nuttall Encyclopedia
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