vena co·mi·tans -'kō-mə-.tanz n, pl venae co·mi·tan·tes -.kō-mə-'tan-.tēz a vein accompanying an artery
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[TA] accompanying vein: a vein, usually occurring in a pair (venae comitantes), that closely accompanies its homonymous artery and is found especially in the extremities.Medical dictionary. 2011.