A blade, wing, or similar projection attached to an axis, wheel, etc., so as to be acted upon by a current of air or liquid or to produce a current…

A solid or perforated disc connecting the hub and rim of a wheel. Sometimes contrasted with spokes. Now rare.

figurative and in extended use. U.S. A bevelled part on a wheel. Obsolete. rare.

(a) a circular guard on a sword or dagger; (b) a guard to protect a wheel from dirt or injury, or to prevent it from chafing some other part of…

An implement resembling a spade in form or use. A spade-like attachment serving to increase the grip of a wheel, retard the motion of a conical…

a cone having a series of circular grooves around its axis, equivalent to a set of pulley wheels of gradually increasing radius.