magnesite

Noun
  1. A white mineral consisting of magnesium carbonate;
    A source of magnesium (synset 114704675)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym: atomic number 12, magnesium, mg - a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)

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