Definition of actinides

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  • actinides is a valid Scrabble US word with a point value of 12
  • actinides is a valid Scrabble UK word with a point value of 12
  • actinides is a valid Words with friends word with a point value of 14

Definition of actinides

  • any of a series of radioactive elements with atomic numbers 89 through 103 (noun)

    Synonyms

    1. actinoid
    2. actinon

See definition of actinides in Merriam Webster