Definitions of barium
  1. noun
    a soft silvery metallic element of the alkali earth group; found in barite
    synonyms: Ba, atomic number 56
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    any of several compounds of barium
    barium hydroxide
    white poisonous crystals; made by dissolving barium oxide in water
    barium monoxide, barium oxide, barium protoxide
    an oxide of barium; a whitish toxic powder
    barium dioxide, barium peroxide
    a white toxic powder obtained by heating barium oxide in air
    type of:
    metal, metallic element
    any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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