Definitions

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

  • n. One that impels, as a rotating device used to force a fluid in a desired direction under pressure.
  • n. A rotor or rotor blade.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Something which or someone who impels, usually a part of a pump.

from the GNU version of the Collaborative International Dictionary of English

  • n. One who, or that which, impels.

from The Century Dictionary and Cyclopedia

  • n. One who or that which impels.
  • n. Specifically, the revolving wheel or pumping element of a centrifugal fan or pump.

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

  • n. the blade of a rotor (as in the compressor of a jet engine)

Etymologies

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