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English dictionary

atomic number 91

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

  1. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

    noun.substance

    Synonyms pa protactinium protoactinium

    Source: WordNet 3.0

Nearby words

atomic number 86atomic number 87atomic number 88atomic number 89atomic number 9atomic number 90atomic number 92atomic number 93atomic number 94atomic number 95atomic number 96atomic number 97

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