coleoptile: Meaning and Definition of

co•le•op•tile

Pronunciation: (kō"lē-op'til, kol"ē-), [key]
— n. Bot.
  1. (in grasses) the first leaf above the ground, forming a sheath around the stem tip.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.