Dictionary
co•le•o•rhi•za
Pronunciation: (kō"lē-u-rī'zu, kol"ē-), [key]—
n.,
—pl. -zaePronunciation: (-zē). [key]
Bot.
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.