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Medical Definition of phrenic artery
: any of the several arteries supplying the diaphragm:
a : either of two arising from the thoracic aorta and distributed over the upper surface of the diaphragm
— called also superior phrenic artery
b : either of two that arise from the abdominal aorta either directly as separate arteries or from the celiac artery or a renal artery or from a common trunk originating in the abdominal aorta or the celiac artery and that supply the underside of the diaphragm and the adrenal glands
— called also inferior phrenic artery
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