thoracic duct

noun

: the main trunk of the system of lymphatic vessels that lies along the front of the spinal column and opens into the left subclavian vein

Word History

First Known Use

circa 1741, in the meaning defined above

Medical Definition

thoracic duct

noun

: the main trunk of the system of lymphatic vessels that lies along the front of the spinal column, extends from a dilatation behind the aorta and opposite the second lumbar vertebra up through the thorax where it turns to the left and opens into the left subclavian vein, and receives chyle from the intestine and lymph from the abdomen, the lower limbs, and the entire left side of the body

called also left lymphatic duct