Defenition of the word actinium

• Defenition of the word actinium

  • A radioactive element of the actinide series, occurring as a decay product of uranium. It is used as an alpha particle source and in neutron production. (Source: CED)
  • a radioactive element of the actinide series; found in uranium ores

Synonyms for the word actinium

• • ac
  • atomic number 89
  • emanium

Hypernyms for the word actinium

• • chemical element
  • element
  • metall

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