ACROMION, Acromium, in Anatomy, the upper Process of the Omoplate, or Shoulder-Bone. See OMOPLATE.The Word is derived from ἄκρος, extremity, and ὦμος, shoulder, i.e., the Extremity of the Shoulder, and not from Anchor, on account of any similarity in Figure which the Acromion bears to an Anchor, as Dionis has imagined. Some have thought the Acromion to be of a nature different from that of other bones; in regard, during infancy, it appears to be no more than a cartilage, which ossifies little by little, and about the age of twenty years becomes hard and firm, like a common bone. See BONE and OSSIFYING.