verb (used with or without object)
noun 1. rototiller. 2. rotary plow.
noun, Machinery. 1. a valve that rotates continuously or through an arc to open and close.
noun, Aeronautics. 1. an airfoil that rotates about an approximately vertical axis, as that supporting a helicopter or autogiro in flight.
verb (used with object), rotated, rotating. 1. to cause to turn around an axis or center point; revolve. 2. to cause to go through a cycle of changes; cause to pass or follow in a fixed routine of succession: to rotate farm crops. 3. to replace (a person, troops, etc.) by another or others, usually […]