a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
Not all gears have teeth. In a rack and pinion gear, the pinion is the gear wheel and it meshes with the rack, which is a long bar with cogs.
(By extension) A device which functions like a synchronized transmission.
Find another word for cogwheel. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for cogwheel, like: geared wheel, gear, gear-wheel, , synchromesh, windlass, cog-wheel and cog.