trapezius
/trəˈpiziəs/
noun
- A large, flat, triangular muscle that covers the upper back, shoulders, and neck, and helps move the head, shoulders, and arms.
- Weightlifters often work on strengthening their trapezius to improve posture.
- The trapezius muscle helps you shrug your shoulders and tilt your head.
- Sitting at a computer all day can make your trapezius feel tight and sore.