in Medicine, the act of making or preparing chyme. The word comes from γυμνός, γυμνοῦ, γυμνοῦ, "I pour out." Chymosis, according to some, is the second of the connections 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 mesenteries, and thence carried to the liver, to be there elaborated, purified, and subtilized afresh. It is of this, according to Rogers, that the animal spirits are formed.

Chymosis is also a distortion of the eye-lids, arising from an inflammation; also an inflammation of the tunicar cornea in the eye.