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ratchet wheel

 - 2 dictionary results

ratchet wheel

–noun
a wheel, with teeth on the edge, into which a pawl drops or catches, as to prevent reversal of motion or convert reciprocating motion into rotatory motion.

Origin:
1770–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ratchet wheel

noun
toothed wheel held in place by a pawl or detent and turned by a lever 
WordNet® 3.0, © 2006 by Princeton University.
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