/ Dictionary / Index C coleorhiza: Meaning and Definition of Find definitions for: co•le•o•rhi•za Pronunciation: (kō"lē-u-rī'zu, kol"ē-), [key] — pl. -zae the sheath that envelops the radicle in certain plants and that is penetrated by the root in germination. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coleoptile Coleridge Related Content Daily Word Quiz: cosmology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language