Of, pertaining to, or effecting rotation; turning or causing to turn about or upon an axis or support; relating to motion from or about a fixed point or center: opposed to reciprocatory.Going about in a recurrent series; moving from point to point; following in succession: as, rotatory assemblies.In zoology, rotatorial or rotiferal, as a wheel-animalcule.In anatomy, causing rotation: as, a rotatory muscle.n. In zoology, a rotatorian or rotifer.