rotator noun. [rǝ(ʊ)'teɪtǝ] L17.
[Orig. from Latin (formed as ROTATE verb); later from ROTATE verb: see -OR.]
1. Anatomy & Zoology. A muscle by which a limb or part can be moved circularly. L17.
rotator cuff Anatomy (the muscles associated with) a capsule with fused tendons that supports the arm at the shoulder joint.

2. A thing which rotates or which causes something to rotate; esp. a laboratory device for rotating bottles etc. so as to mix the contents. L18.

[TahlilGaran] English Dictionary ▲