/ Dictionary / Index C catabolism: Meaning and Definition of Find definitions for: ca•tab•o•lism Pronunciation: (ku-tab'u-liz"um), [key] — n. Biol., Physiol. destructive metabolism; the breaking down in living organisms of more complex substances into simpler ones, with the release of energy (opposed to anabolism). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: catabolism (Thesaurus) catabasis catabolite Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language