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 of ratchet wheel

First recorded in 1770–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ratchet wheel

Historical Examples of ratchet wheel