Medical Definition of plantar artery
: either of the two terminal branches into which the posterior tibial artery divides:a: one that is larger and passes laterally and then medially to join with a branch of the dorsalis pedis to form the plantar arch—called also lateral plantar arteryb: one that is smaller and follows a more medial course as it passes distally supplying or giving off branches which supply the plantar part of the foot and the toes—called also medial plantar artery
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