The partial or total surgical excision of the acromion: Acromionectomy refers to the resection of the distal end of the acromion, done in the treatment of acromioclavicular arthritis.

The acromion is the lateral extension of the spine of the scapula, projecting over the shoulder joint and forming the highest point of the shoulder. It is also called the "acromial process" and "acromion scapulae".