SG Heritage Dictionary

Rotator [Noun] Webster's Dictionary 1828

That which gives a circular or rolling motion; a muscle producing a rolling motion.

Rotator [Noun] Webster's Dictionary 1913

1. that which gives a rotary or rolling motion, as a muscle which partially rotates or turns some part on its axis.

2. A revolving reverberatory furnace.

Rotatoria [Noun plural] Webster's Dictionary 1913

Same as Rotifera.

Rotatory [Adjective] Webster's Dictionary 1828

1. Turning on an axis, as a wheel; rotary.

2. Going in a circle; following in succession; as rotatory assemblies.

3. [This word is often used, probably by mistake, for rotary. It may be regularly formed from rotator, but not with the exact sense in which it is used. With rotator for its original, it would signify causing rather than being in a circular motion. The true word is rotary.]

Rotatory [Adjective] Webster's Dictionary 1913

1. Turning as on an axis; rotary.

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

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

Rotatory [Noun] Webster's Dictionary 1913

A rotifer.