in Medicine, the act of making or preparing chyme. The word comes from χυμος, συκεων, of χυμον, fundo, "I pour out." Chymosis, according to some, is the second of the concoctions made in the body; being a repeated preparation of the most impure and gross parts of the chyle, which being rejected by the lacteals, is imbibed by the meleterics, and thence carried to the liver, to be there elaborated, purified, and utilized afresh. It is of this, according to Rogers, that the animal spirits are formed.

CHYMOSTIS is also a distention of the eye-lids, arising from an inflammation; also an inflammation of the tarsica cornes in the eye.