A wheel with cogs, used to transmit motion; more generally, a toothed wheel which engages with another similar wheel, or with a toothed bar or…

(a) the first, or driving, wheel in a series of gears, esp. in a clock or watch; (b) Aeronautics each of the wheels which are located near the…

A gear-wheel which has cogs or teeth on the periphery, projecting radially from the centre; a cog-wheel.

a toothed wheel which engages with a rack; a pinion.

Machinery. Wheels working one upon another, by means of teeth, or otherwise. a train of gears: a set of such wheels. Often preceded by some…

The action of fitting a machine with gear; the manner in which a machine is geared; concrete apparatus for the transmission of motion or power, e.g…

gearing consisting of spur-wheels.

a toothed wheel that engages with another wheel, or with a rack, pitch chain, etc.; a cogwheel.

a wheel with teeth, a toothed wheel, cog-wheel.

(a) a cog-wheel; (b) (in a bicycle, etc.) the cog-wheel by means of which the motion of the pedals is transmitted to the axle.

a wheel forming part of a maintaining power.

Short for. The series of cogs round a wheel (obsolete).