D defs.my
Entry 1 sense Webster, 1913

Boracite

· Bo·ra·cite · IPA
01 n. A mineral of a white or gray color occurring massive and in isometric crystals; in composition it is a magnesium borate with magnesium chloride.
  1. 1.
    A mineral of a white or gray color occurring massive and in isometric crystals; in composition it is a magnesium borate with magnesium chloride.(Min.)