apatite

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate;
a source of phosphorus
• Hypernyms:
mineral
• Hyponyms:
fluorapatite
• Substance Meronyms:
phosphorus, P, atomic number 15, terbium, Tb,
atomic number 65, thulium, Tm, atomic number 69