actinide
Americannoun
noun
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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.
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See Periodic Table
Etymology
Origin of actinide
1940–45; actin- + -ide, on the model of lanthanide
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Many of these elements, such as those in the lanthanide and actinide series, have applications ranging from cancer diagnostics and treatment to renewable energy technologies and long-lived nuclear batteries for deep space exploration.
From Science Daily • May 22, 2024
Researchers continue sketching out the full picture of actinide isotopes.
From Science Daily • Sep. 28, 2023
Since then, fission has been observed in many other isotopes, including most actinide isotopes that have an odd number of neutrons.
From Textbooks • Feb. 14, 2019
They are the uranium series, the actinide series, and the thorium series.
From Textbooks • Feb. 14, 2019
In the years that followed, he served on Nuclear Regulatory Commission discussion panels, a National Academy of Sciences panel on nuclear waste and created a research center for the study of actinide materials.
From Scientific American • Mar. 12, 2012
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
