Definitions

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

  • n. See thumb.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The first, or preaxial, digit of the forelimb, corresponding to the hallux in the hind limb; the thumb. In birds, the pollex is the joint which bears the bastard wing.

from the GNU version of the Collaborative International Dictionary of English

  • n. The first, or preaxial, digit of the fore limb, corresponding to the hallux in the hind limb; the thumb. In birds, the pollex is the joint which bears the bastard wing.

from The Century Dictionary and Cyclopedia

  • n. In anatomy, the innermost digit of the hand or foot, when there are five; the thumb or the great toe, especially the thumb, the great toe being usually distinguished as pollex pedis, or hallux.
  • n. In zoology: The innermost digit of the fore limb only, when there are five; the digit that corresponds to the human thumb.
  • n. The thumb of a bird; the short digit bearing the alula or bastard wing, regarded as homologous with either the human thumb or the forefinger.
  • n. The movable joint of the forceps of the lobster, crawfish, or crab; a dactylopodite.

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

  • n. the thick short innermost digit of the forelimb

Etymologies

Latin, thumb, big toe.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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