Merriam-Webster Collegiate Dictionary - rotate

 I. adjective  Etymology: Latin rota  Date: 1785 having the parts flat and spreading or radiating like the spokes of a wheel ~ blue flowers  II. verb  (~d; rotating)  Etymology: Latin rotatus, past participle of rotare, from rota wheel — more at roll  Date: 1785  intransitive verb  1.  a. to perform an act, function, or operation in turn  b. to pass or alternate in a series  2. to turn about an axis or a center ; revolve; especially to move in such a way that all particles follow circles with a common angular velocity about a common axis  transitive verb  1.  a. to cause to turn or move about an axis or a center  b. to cause (a plane region or line) to sweep out a volume or surface by moving around an axis so that each of its points remains at a constant distance from the axis generate a torus by rotating a circle about an external line  2. to cause to grow in rotation ~ crops  3. to cause to pass or act in a series ; alternate  4. to exchange (individuals or units) with others  • rotatable adjective