xenotime

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form
• Hypernyms:
mineral
• Substance Meronyms:
thulium, Tm, atomic number 69, ytterbium, Yb,
atomic number 70, yttrium, Y, atomic number 39