Definition of "acromion"

"The ball struck the fore part of HIS LORDSHIP'S epaulette; and entered the left shoulder immediately before the processus acromion scapulae, which it slightly fractured.

1807, William Beatty, The Death of Lord Nelson‎

The deltoid is wasted, and the acromion unduly prominent.

1904, Alexis Thomson, Alexander Miles, Manual of Surgery‎

Complete pectoral and pelvic bones show a deep subrectangular acromion on the scapula and a low obturator flange on the ischium.

1998 November 13, Paul C. Sereno et al., “A Long-Snouted Predatory Dinosaur from Africa and the Evolution of Spinosaurids”, in Science‎, volume 282, number 5392, pages 1298–1302

The preserved portions of the scapula are sufficient to determine that the acromion projected well beyond the glenoid and that the axillary margin was longer than the vertebral.

1999 August 27, Steve Ward et al., “Equatorius: A New Hominoid Genus from the Middle Miocene of Kenya”, in Science‎, volume 285, number 5432, pages 1382–1386

The clavicle is a small flat bone like that of a dog (1), here preserved near the coracoid processes lying parallel to and slightly behind the acromion.

2009, Science‎, pages 2239–2242