Chylaceous is a term used in the medical field to describe something that has the appearance or consistency of chyle, a milky fluid that is formed in the small intestine during digestion. Synonyms for chylaceous include lactescent, emulsified, creamlike, milky, and chyle-like. These terms are often used to describe bodily fluids, such as lymph, synovial fluid, and serous fluid, that have a similar appearance to chyle. Chylaceous also refers to the appearance of certain tumors that have a milky, opaque appearance, such as mesenteric cysts and chylous lymphangiomas. Overall, chylaceous is a technical term used to describe the milky, opaque appearance of certain substances or structures in the body.