/ Dictionary / Index R rhizogenic: Meaning and Definition of Find definitions for: rhi•zo•gen•ic Pronunciation: (rī"zō-jen'ik), [key] — adj. Bot. producing roots, as certain cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rhizoctonia rhizoid Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language