Coracoacromial ligament: one of the ligaments of the shoulder. Ligaments are bands of tough fibrous connective tissue that connect bones or cartilage. The coracoacromial ligament joins two parts of the shoulder blade (scapula), connecting the acromion to the coracoid process. It forms a part of a protective covering for the upper portion of the bone of the upper arm (humerus). Calcifications of the coracoacromial ligament can cause shoulder impingement syndrome.
Longo, D.L., et al. Harrison's Principles of Internal Medicine, 18th ed. United States: McGraw-Hill Professional, 2011.