cogwheel

from WordNet (r) 3.0 (2006)

cogwheel
    n 1: a toothed wheel that engages another toothed mechanism in
         order to change the speed or direction of transmitted
         motion [syn: {gear}, {gear wheel}, {geared wheel},
         {cogwheel}]

from The Collaborative International Dictionary of English v.0.48

Cogwheel \Cog"wheel`\, n.
   A wheel with cogs or teeth; a gear wheel. See Illust. of
   {Gearing}.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

22 Moby Thesaurus words for "cogwheel":
      Hydromatic, automatic transmission, differential,
      differential gear, freewheel, gear, gear train, gearbox, gearing,
      gearshift, gearwheel, high, intermediate, low, neutral, overdrive,
      rack, reverse, standard transmission, stick shift, synchromesh,
      transmission

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