rotator cuff /ˈroʊˌteɪtɚ-/ noun plural rotator cuffs
plural rotator cuffs
Learner's definition of ROTATOR CUFF
[count] chiefly US, medical
: a group of muscles and tendons that are around your shoulder and that allow it to move in all directions（肩关节囊的）肌腱套，旋转套