from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A toothed wheel either held in position or turned by an engaging detent or pawl.
  • noun The retaining wheel over the mainspring arbor of a timepiece.

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

  • noun toothed wheel held in place by a pawl or detent and turned by a lever


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