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atomic number 69
Noun
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
synonym
thulium
Tm
holo substance
apatite
monazite
xenotime
hypernym
metal
metallic element
atomic number 69 vs Tm
atomic number 69 vs metal
atomic number 69 vs metallic element
atomic number 69 vs thulium
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