Ro″ta‐to‐ry (?), a. [Cf. F. rotatoire. See Rotate, Rotary.] 1. Turning as on an axis; rotary.
2. Going in a circle; following in rotation or succession; as, rotatory assembles. Burke.
3. (Opt.) Producing rotation of the plane of polarization; as, the rotatory power of bodies on light. See the Note under polarization. Nichol.