limestone

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
• Hypernyms:
rock, stone, sedimentary rock
• Hyponyms:
rottenstone, tripoli
• Substance Meronyms:
calcium, Ca, atomic number 20, carbon, C,
atomic number 6, calcite