hard coal

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a hard natural coal that burns slowly and gives intense heat
• Syn:
anthracite, anthracite coal
• Derivationally related forms:
anthracitic (for: anthracite)
• Hypernyms:
coal

• Từ đồng nghĩa / Synonyms:
  anthracite, anthracite coal