n. any one of three photopigments found in the retinal cones. Each consists of 11-cis-retinal combined with one of three different opsins, each of which confers a different wavelength sensitivity on the iodopsin. Also called cone opsin. See also rhodopsin.
n. an inflammation of the pancreas, marked by severe abdominal pain and caused by biliary tract disorders (e.g., gallstones), alcoholism, viral infection, or reactions to certain drugs (e.g., some antipsychotic agents).