coleorhiza[kō′lē ō rī′zə, käl′ē-]
coleorhiza definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. coleorhizae
a protective root sheath of grass seedlings through which the primary root emerges
Origin: Modern Latin ; from Classical Greek koleos, sheath plush rhiza, root
coleorhiza definition by American Heritage Dictionary
noun pl. co·le·o·rhi·zae
A protective sheath enclosing the embryonic root of grasses.
Origin: New Latin : Greek koleon, sheath; see kel-1 in Indo-European roots + Greek rhiza, root; see wrād- in Indo-European roots.