chylocyst

cis·ter·na chy·'li

[TA] a dilated sac at the lower end of the thoracic duct into which the intestinal trunk and two lumbar lymphatic trunks open; it occurs inconsistently and when present is located posterior to the aorta on the anterior aspect of the bodies of the first and second lumbar vertebrae. Synonym(s): chyle cistern ☆ , ampulla chyli, chylocyst, Pecquet cistern, Pecquet reservoir, receptaculum chyli, receptaculum pecqueti