1. Turning as on an axis; rotary.

2. Going in a circle; following in rotation or succession; as, rotatory assembles.

3. <optics> Producing rotation of the plane of polarization; as, the rotatory power of bodies on light. See the Note under polarization.

Origin: Cf. F. Rotatoire. See Rotate, Rotary.

<zoology> A rotifer.

(01 Mar 1998)