cat agenesis


noun Biology.
the retrogressive evolution of a species. Compare anagenesis ( def 1 ).

1880–85; cata- + genesis

catagenetic [kat-uh-juh-net-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

catagenesis cat·a·gen·e·sis (kāt'ə-jěn'ĭ-sĭs)
See involution.

The American Heritage® Stedman's Medical Dictionary
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