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Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
-
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Source: WordNet 3.0
English dictionary
Definitions, examples, synonyms and antonyms from WordNet 3.0.
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Source: WordNet 3.0