English dictionary
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English noun: protoactinium | |||
| 1. | protoactinium (substance) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead | ||
| Synonyms | atomic number 91, Pa, protactinium | ||
| Broader (hypernym) | metal, metallic element | ||
Based on WordNet 3.0 copyright © Princeton University.
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Web design: Orcapia v/Per Bang. English edition: .
2026 onlineordbog.dk