/ Dictionary / Index C clubroot: Meaning and Definition of Find definitions for: club•root Pronunciation: (klub'rt", -root"), [key] — n. a disease of cabbage and other cruciferous plants, characterized by enlarged, malformed roots, caused by a slime mold, Plasmodiophora brassicae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. clubroom club sandwich Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language