| Noun | 1. | thyroid vein - any of several small veins draining blood from the thyroid area inferior thyroid vein - any of several veins on each side that drain the thyroid gland and empty into the innominate vein middle thyroid vein - a vein on each side that drains the lateral part of the thyroid and empties into the internal jugular vein superior thyroid vein - a vein on each side that drains the upper part of the thyroid and empties into the internal jugular vein 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" |