(rail transport) A system of classifying the way the driving wheels and non-driving wheels are distributed under a locomotive.

plural of wheel tax

A tax on carriages, assessed according to the number of wheels.

plural of dash-wheel

A wheel-shaped box with compartments, in which cotton cloth is washed by the revolution of the wheel in liquid.

plural of diamond wheel

A wheel covered with diamond dust and oil for polishing diamonds and other precious stones.

(engineering) A wheel placed between two others to transfer motion from one to the other without changing the direction.

plural of idle wheel

A machine for cutting the teeth on watch and clock wheels.