The chemical element (symbol Ba) with an atomic number of 56. It is a soft, reactive, silvery alkaline earth metal. / (countable) A single atom of this element. / (medicine) barium sulfate suspension.

plural of barium

plural of barium meal

(inorganic chemistry) The barium salt of thiocyanic acid, Ba(SCN)₂, used in photography and in dyeing

(inorganic chemistry) The barium salt of arsenic acid, Ba₃(AsO₄)₂, formed as a precipitate when removing arsenic from water supplies.

(medicine) A preparation of barium sulfate (a radioopaque compound) which the patient ingests for the purpose of producing clear radiographs of the esophagus, stomach, and duodenum.

(astronomy) Any of a class of giant stars whose spectra show the presence of s-process elements (such as barium)

plural of barium star

alternative form of barite.

alternative form of barium sulphate.