actinide









actinide


noun Chemistry.

  1. any element of the actinide series.

noun

  1. a member of the actinide seriesAlso called: actinon

n.

  1. Any of a series of chemically similar radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).

  1. Any of a series of chemically similar metallic elements with atomic numbers ranging from 89 (actinium) to 103 (lawrencium). All of these elements are radioactive, and two of the elements, uranium and plutonium, are used to generate nuclear energy. See Periodic Table.

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