13-Letter Words Containing: X,O,R,S

• a monoamine oxidase inhibitor (trade name Marplan) that is used to treat clinical depression

• a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive

• a group of viruses including those causing mumps and measles

• accumulation of fluid in the pleural cavity (the space between the lungs and the walls of the chest) often resulting from disease of the heart or kidneys

• a coenzyme important in respiration in the Krebs cycle