n. [ L. lana wool + oleum oil. ] (Physiol. Chem.) A peculiar fatlike body, made up of cholesterin and certain fatty acids, found in feathers, hair, wool, and keratin tissues generally. [ 1913 Webster ]

☞ Under the same name, it is prepared from wool for commercial purposes, and forms an admirable basis for ointments, being readily absorbed by the skin. [ 1913 Webster ]