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
French language
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thulium::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Synonyms | atomic number 69, tm |
| Type of | metal, metallic element |
