An axle is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type axle is referred to as a spindle.
A jump that includes one (or more than one) complete turn and a half turn while in the air.
The pin or spindle on which a wheel revolves, or which revolves with a wheel.
A transverse bar or shaft connecting the opposite wheels of a car or carriage; an axletree.
An axis; as, the Sun’s axle.
a jump in skating from the forward outside edge of one skate to the backward outside edge of the other, with one (or more) and a half turns in the air.