Acromion

noun

1. The outer end of the scapula to which the collarbone is attached.
2. In anatomy, the distal end of the spine of the scapula or shoulder-blade.
3. In ichthyology, same as supraclavicle; a shoulder-girdle bone above the clavicle.
4. The outer extremity of the shoulder blade.
5. The outermost point of the shoulder blade.