bitter spar

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a light colored mineral consisting of calcium magnesium carbonate;
a source of magnesium;
used as a ceramic and as fertilizer
• Syn:
dolomite
• Derivationally related forms:
dolomitic (for: dolomite)
• Hypernyms:
mineral
• Substance Meronyms:
magnesium, Mg, atomic number 12