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catagenesis

[kat-uh-jen-uh-sis] /ˌkæt əˈdʒɛn ə sɪs/
noun, Biology.
1.
the retrogressive evolution of a species.
Compare anagenesis (def 1).
Origin of catagenesis
1880-1885
First recorded in 1880-85; cata- + genesis
Related forms
catagenetic
[kat-uh-juh-net-ik] /ˌkæt ə dʒəˈnɛt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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catagenesis in Medicine

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

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