barium sulphate

Noun
  1. A white insoluble radiopaque powder used as a pigment (synset 114797038)
    is a type of: sulfate, sulphate - a salt or ester of sulphuric acid
    same as: barium sulfate, blanc fixe
  2. A white or colorless mineral (BaSO4);
    The main source of barium (synset 114702391)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym: atomic number 56, ba, barium - a soft silvery metallic element of the alkali earth group; found in barite
    same as: barite, barytes, heavy spar

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