Barium:1.A metallic element belonging to the alkaline earths with an atomic number of 56 and an atomic weight of 137.34. The symbol forbariumisBa.
2.Inmedicine, refers to a chalky solution of barium used to coat the inside of organs, such as thestomachorintestinesso that they willshowup on anx-ray.
See also: Barium enema; Barium swallow.
