IPA: /əˈkroʊmiəl/
KK: /əˈkroʊmiəl/
Related to the acromion, which is a bony process on the shoulder blade.
The acromial process is an important landmark in shoulder anatomy.
Acromial is derived from "acro-" (from Greek "akron", meaning peak or top) and "-mial" (from Latin "malleus", meaning hammer, but in this context refers to a related anatomical term). The term "acromial" refers to something related to the peak or top of the shoulder, specifically the acromion, which is the bony process on the scapula.
Imagine the 'peak' ('acro-') of your shoulder where the acromion is located — that's why 'acromial' refers to that area.