Pronunciation: (kyOO'pyOOl), [key]
a. a cup-shaped whorl of hardened, cohering bracts, as in the acorn. See illus. under acorn.
b. a cup-shaped outgrowth of the thallus of certain liverworts.
c. the apothecium of a cup fungus.
2. Zool.a small cup-shaped sucker or similar organ or part.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.