rotator cuff
nounUK /rəʊˈteɪtə kʌf/
US /ˈroʊteɪtər kʌf/
A group of muscles and tendons that hold your shoulder joint together and help you move your arm.
The doctor said he hurt his rotator cuff while playing tennis.
OTHER MEANINGS
2. A set of four muscles in the shoulder that keep the upper arm bone in its socket.
The rotator cuff includes the supraspinatus and three other muscles.
3. An injury or tear in these shoulder muscles and tendons.
She had surgery to repair a torn rotator cuff.
4. A common term in sports medicine for shoulder stability problems.
Pitchers often worry about rotator cuff injuries.