electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa, Usually with a capital initial, short for Rotary movement, an international club for community service, A part or device that rotates around an axis, adjective_ Of, relating to, causing, or characterized by rotation, especially around an axis, steam engine in which the continuous rotation of the shaft is produced by the direct action of the steam upon rotating devices which serve as pistons, instead of being derived from a reciprocating motion, as in the ordinary engine; a steam turbine; -- called also rotatory engine, a valve acting by continuous or partial rotation, as in the four-way cock