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gerontomorphosis

[juh-ron-tuh-mawr-fuh-sis]
noun
  1. Biology. evolutionary specialization of a species to a degree that decreases its capability for further adaptation and eventually leads to its extinction.
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Origin of gerontomorphosis

First recorded in 1925–30; geronto- + morphosis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018