[TA] one of the two terminal lymph vessels, a short trunk, about 2 cm long, formed by the union of the right jugular lymphatic vessel and vessels from the lymph nodes of the right superior limb, thoracic wall, and both lungs; it lies on the right side of the root of the neck and empties into the right brachiocephalic vein. Frequently, no right lymphatic duct forms, with the vessels that normally contribute to its formation entering the venous system independently. SYN: ductus lymphaticus dexter [TA], ductus thoracicus dexter*.