actinide

noun

ac·ti·nide | \ˈak-tə-ˌnīd

Definition of actinide

: any of the series of elements with increasing atomic numbers that begins with actinium or thorium and ends with lawrencium — see Periodic Table

Examples of actinide in a Sentence

Recent Examples on the Web

Uranium is currently the actinide of choice for the industry, used (sometimes with a little plutonium) in 100 percent of the world’s commercial reactors. — Richard Martin, WIRED, "Uranium Is So Last Century — Enter Thorium, the New Green Nuke," 21 Dec. 2009

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