from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The toothed wheel of a worm gear.

from The Century Dictionary.

  • noun A wheel which gears with an endless or tangent screw or worm, receiving or imparting motion.

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

  • noun gear with the thread of a worm


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