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catagenesis

[kat-uh-jen-uh-sis]
noun Biology.
  1. the retrogressive evolution of a species.Compare anagenesis(def 1).
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Origin of catagenesis

First recorded in 1880–85; cata- + genesis
Related formscat·a·ge·net·ic [kat-uh-juh-net-ik] /ˌkæt ə dʒəˈnɛt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

catagenesis in Medicine

catagenesis

(kăt′ə-jĕnĭ-sĭs)
n.
  1. involution
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.