13-Letter Words Containing: E,O,R,X,Y

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

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• 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

• (of quantities) imprecise but fairly close to correct

• a coenzyme important in respiration in the Krebs cycle