a pump for transferring water or other fluids by the rotating action of its component parts, as by the meshing of vanes or screws.
(engineering) a pump in which a liquid is displaced through a shaped stator by a shaped rotor
noun 1. a camera shutter consisting of a rotating disk pierced with a slit that passes in front of the lens to expose the film or plate.
verb (used with or without object) 1. rototill.
noun 1. rototiller. 2. rotary plow.
noun, Machinery. 1. a valve that rotates continuously or through an arc to open and close.