/ Dictionary / Index C cladism: Meaning and Definition of Find definitions for: clad•ism Pronunciation: (klad'iz-um, klā'diz-), [key] — n. Biol. the cladistic method of classification. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. clade cladistics Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language