noun
a combining form meaning 'acromion' or 'acromial'
adjective
relating to the acromion or acromial
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The acromio-clavicular joint is important for shoulder stability.
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I think I injured my acromio-clavicular joint playing sports.
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My acromio-clavicular joint is acting up again, it's so annoying.
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The acromio-clavicular joint is like the glue that holds the shoulder together.