Meaning of pinion

pin•ion

Pronunciation: (pin'yun), [key]
— n.
    1. a gear with a small number of teeth, esp. one engaging with a rack or larger gear. See diag. underrack1.
    2. a shaft or spindle cut with teeth engaging with a gear.
  1. a gear driving a roll in a rolling mill.

pin•ion

Pronunciation: (pin'yun), [key]
— n.
  1. the distal or terminal segment of the wing of a bird consisting of the carpus, metacarpus, and phalanges.
  2. the wing of a bird.
  3. a feather.
  4. the flight feathers collectively.
—v.t.
  1. to cut off the pinion of (a wing) or bind (the wings), as in order to prevent a bird from flying.
  2. to disable or restrain (a bird) in such a manner.
  3. to bind (a person's arms or hands) so they cannot be used.
  4. to disable (someone) in such a manner; shackle.
  5. to bind or hold fast, as to a thing: to be pinioned to one's bad habits.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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