Dictionary.com
definitions
  • synonyms

actinide

[ak-tuh-nahyd]
See more synonyms for actinide on Thesaurus.com
noun Chemistry.
  1. any element of the actinide series.
Show More

Origin of actinide

1940–45; actin- + -ide, on the model of lanthanide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for actinide

actinide

noun
  1. a member of the actinide seriesAlso called: actinon
Show More

Word Origin

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
actinide in Medicine

actinide

(ăk′tə-nīd′)
n.
  1. Any of a series of chemically similar radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
actinide in Science

actinide

[ăk′tə-nīd′]
  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.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.