Abbreviation for trapezius muscles, the largest muscles of the back and neck that draw head backward and rotate scapula.

a kite-shaped muscle of the back with the points of the "kite" at the base of the skull, the shoulders, and the center of the lower back. The trapezius is primarily visible as the pair of bulges on either side of the neck. exercises for the trapezius include

shrugs and

upright rows