Chyle

Part of speech: noun

Pronunciation: /kaɪl/

Definitions

1. A substance that forms in the digestive system after emulsifying fats, which consists of fat droplets and provides nutrients to the body through lymphatic absorption
2. This nutrient-rich fluid produced during digestion carries absorbed fats and is significant for lymphatic transport into the circulatory system
3. A milky bodily fluid formed in the intestines during digestion that contains emulsified fats and plays a crucial role in nutrient absorption through the lymphatic system

Etymology: Ancient Greek physicians used "khulós" for the juice of plants and animals, the sense of something pressed or flowing out. Its Latin descendant "chylus" carried that meaning into medicine, where it named the milky fluid that the intestines absorb from digested food. The English noun came by way of French, and it is a case of a word that stayed technical: it has never drifted far from the body's plumbing. The fluid is so named for its appearance. Chyle is absorbed by the lacteals, tiny vessels in the intestinal wall, and it looks milky because it carries fat droplets, which is why the lymphatic vessels that carry it were long called lacteals, from the Latin for milk. The word and the milk-like look of the fluid thus sit close together, even though the Greek root meant plain juice rather than anything white.