Definition of subclavian vein
: the proximal part of the main vein of the arm or forelimb
First Known Use of subclavian vein
Medical Definition of subclavian vein
: the proximal part of the main vein of the arm that is a continuation of the axillary vein and extends from the level of the first rib to the sternal end of the clavicle where it unites with the internal jugular vein to form the brachiocephalic vein
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