actinoid

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• February 26. 2016 from wordnet.princeton.edu

  actinoid — noun — english

  any of a series of radioactive elements with atomic numbers 89 through 103

• March 23. 2016 from wordnet.princeton.edu

  actinoid — adjective — english

  having a radial form; "starfish are actinoid--that is, they are radially symmetrical"