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English noun: Tm

1. Tm (substance) a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime


Synonymsatomic number 69, thulium


Broader (hypernym)metal, metallic element


Substance meronymapatite, monazite, xenotime









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