/roh"tay teuhr/ or, esp. Brit, /roh tay"-/ , n. , pl. rotators for 1, 3, rotatores /roh'teuh tawr"eez, -tohr"-/ for 2.
1. a person or thing that rotates.
2. Anat. a muscle serving to rotate a part of the body.
3. Naut. a bladed device streamed to rotate in the water to actuate a patent log.
[ 1670-80; rotator, equiv. to rota ( re ) (see ROTATE 1 ) + -tor -TOR ]