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gear·wheelalso gear wheel (gîr′wēl′, -hwēl′)
A wheel with a toothed rim.
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|Noun||1.||gear wheel - a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion|
escape wheel - gear that engages a rocking lever
pinion - a gear with a small number of teeth designed to mesh with a larger wheel or rack
epicyclic gear, planet gear, planet wheel, planetary gear - an outer gear that revolves about a central sun gear of an epicyclic train
rack and pinion - a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)
sun gear - the central gear in an epicyclic train
tooth - one of a number of uniform projections on a gear
wheel - a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
worm gear - gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion
worm wheel - gear with the thread of a worm