Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A small cup-shaped structure or organ, such as the cup at the base of an acorn or one of the suckers on the feet of certain flies.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any small structure shaped like a cup, such as at the base of an acorn, or the sucker on the feet of some flies

from the GNU version of the Collaborative International Dictionary of English

  • n. A cuplet or little cup, as of the acorn; the husk or bur of the filbert, chestnut, etc.
  • n. A sucker or acetabulum.

from The Century Dictionary and Cyclopedia

  • n. A small cup-shaped depression, as in rock.
  • n. In botany: A form of involucre, occurring in the oak, beech, chestnut, and hazel, consisting of bracts which in fruit cohere into a kind of cup. In fungi, a receptacle shaped like the cup of an acorn, as in Peziza.
  • n. In entomology, a little cup-shaped organ; specifically, one of the sucking-disks on the lower surface of the tarsi of certain aquatic beetles.
  • n. Also cupula.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. cup-shaped structure of hardened bracts at the base of an acorn
  • n. a sucker on the feet of certain flies

Etymologies

Late Latin cūpula, little cask, diminutive of Latin cūpa, tub.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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