Definitions

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

  • n. A gear, wheel, or roller interposed between two similar parts to convey motion from one to the other without change in speed or direction of motion.
  • n. See idle pulley.

from the GNU version of the Collaborative International Dictionary of English

  • adj. a gear wheel placed between two others, to transfer motion from one to the other without changing the direction of revolution.

from The Century Dictionary and Cyclopedia

  • n. A wheel (C, fig. 1) placed between two others (A and B) for the purpose of transferring the motion from one axis to the other without change of direction; a carrier-wheel.
  • n. A wheel that performs a duty other than the transmission of power, as the preservation of a strain on a belt, etc.

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

  • n. a pulley on a shaft that presses against a guide belt to guide or tighten it

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