English dictionary
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English noun: atomic number 69 | |||
| 1. | atomic number 69 (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 | ||
| Synonyms | thulium, Tm | ||
| Broader (hypernym) | metal, metallic element | ||
| Substance meronym | apatite, monazite, xenotime | ||
Based on WordNet 3.0 copyright © Princeton University.
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Web design: Orcapia v/Per Bang. English edition: .
2025 onlineordbog.dk