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Thesaurus: actinon

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

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atomicdefinitionelementsdefinitionnumbersdefinitionradioactivedefinitionseriesdefinitionhalf-lifedefinitionradioisotopedefinitionradondefinitionsecondsdefinitionactinfamilyactinalfamilyactinariafamilyactingfamilyacting outfamilyactingsfamilyactiniafamilyactiniaefamilyactinianfamilyactiniansfamilyactiniarianfamilyactiniasfamilyactinicfamilyactinic dermatitisfamilyactinic keratosisfamilyactinic radiationfamilyactinic rayfamilyactinidefamilyactinide seriesfamily

Definitions

  1. n. any of a series of radioactive elements with atomic numbers 89 through 103
  2. n. an radioisotope of radon with a half-life of about four seconds
  3. n any of a series of radioactive elements with atomic numbers 89 through 103