accompanying vein accompanying vein /əˈkʌmpəniɪŋ veɪn/

noun

1. A vein accompanying another structure; a vein may accompany an artery in such a way that the arterial pulses aid venous return  ( accompanying vein , vena comitans )
   a vein accompanying another structure; a vein may accompany an artery in such a way that the arterial pulses aid venous return