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acromion

noun
acro·​mi·​on | \ ə-ˈkrō-mē-ˌän, -ən \

Medical Definition of acromion

: the outer end of the spine of the scapula that protects the glenoid cavity, forms the outer angle of the shoulder, and articulates with the clavicle

— called also acromial process, acromion process

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