1540s, from Late Latin chylus, from Greek khylos "juice" (of plants, animals, etc.), from stem of khein "to pour, gush forth," from PIE *ghus-mo-, from root *gheu- "to pour, pour a libation" (see found (v.2)). Cf. also chyme.
chyle (kīl)n. A turbid, white or pale yellow fluid taken up by the lacteals from the intestine during digestion and carried by the lymphatic system via the thoracic duct into the circulation.