n. a monocular depth cue occurring when two objects are in the same line of vision and the closer object, which is fully in view, partly conceals the farther object. Also called relative position.
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).