/ Dictionary / Index R rhizocarpous: Meaning and Definition of Find definitions for: rhi•zo•car•pous Pronunciation: (rī"zō-kär'pus), [key] — adj. Bot. having the root perennial but the stem annual, as perennial herbs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rhizobium rhizocephalous Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language