/ Dictionary / Index C catagenesis: Meaning and Definition of Find definitions for: cat•a•gen•e•sis Pronunciation: (kat"u-jen'u-sis), [key] — n. Biol. the retrogressive evolution of a species. Cf. anagenesis (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. catafalque Catalan Related Content Daily Word Quiz: confectionery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language