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actinide
[ ak-tuh-nahyd ]
/ ˈæk təˌnaɪd /
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noun Chemistry.
any element of the actinide series.
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Origin of actinide
Words nearby actinide
acting area, actinia, actinian, actinic, actinic ray, actinide, actinide series, actiniform, actinin, actinism, actinium
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for actinide
actinide
/ (ˈæktɪˌnaɪd) /
noun
a member of the actinide seriesAlso called: actinon
Word Origin for actinide
C19: from actino- + -ide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for actinide
actinide
[ ăk′tə-nīd′ ]
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.
The American Heritage® Science Dictionary
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