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Từ điển Oxford Learners Wordfinder Dictionary

atomic number 39

noun

a silvery metallic element that is common in rare-earth minerals;
used in magnesium and aluminum alloys
• Syn:
yttrium, Y
• Hypernyms:
metallic element, metal
• Substance Holonyms:
gadolinite, ytterbite, fergusonite, xenotime