Relating to anatomical structures located under the collarbone, especially important blood vessels that supply the arms and brain.
From Latin 'sub-' (under) and 'clavis' (collarbone/key). Medical terminology coined in the 1600s-1700s as anatomy became more precisely mapped.
The subclavian artery is a critical vessel that cardiologists and surgeons watch carefully—blockages there can be life-threatening but are also perfect access points for emergency procedures like inserting heart pumps.
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