Dictionary  worm' gear"1. a mechanism consisting of a worm engaging with and driving a worm wheel, the two axes usually being at right angles, used where a relatively low speed and a relatively large amplification of power are desired. 2. Also called worm wheel. a gear wheel driven by a worm. Also,worm'gear". Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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