Noun

• S: (n) 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)
• direct hypernym / inherited hypernym / sister term
• S: (n) vein, vena, venous blood vessel (a blood vessel that carries blood from the capillaries toward the heart) "all veins except the pulmonary vein carry unaerated blood"
• S: (n) blood vessel (a vessel in which blood circulates)
• S: (n) vessel, vas (a tube in which a body fluid circulates)
• S: (n) tube, tube-shaped structure ((anatomy) any hollow cylindrical body structure)
• S: (n) structure, anatomical structure, complex body part, bodily structure, body structure (a particular complex anatomical part of a living thing and its construction and arrangement) "he has good bone structure"
• S: (n) body part (any part of an organism such as an organ or extremity)
• S: (n) part, piece (a portion of a natural object) "they analyzed the river into three parts"; "he needed a piece of granite"
• S: (n) thing (a separate and self-contained entity)
• S: (n) physical entity (an entity that has physical existence)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))