follow Dictionary.com

11 Trending Words of 2014

actinide

[ak-tuh-nahyd] /ˈæk təˌnaɪd/
noun, Chemistry
1.
any element of the actinide series.
Origin
1940-1945
1940-45; actin- + -ide, on the model of lanthanide
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for actinides

actinide

/ˈæktɪˌnaɪd/
noun
1.
a member of the actinide series Also called actinon
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
Cite This Source
actinides in Medicine

actinide ac·ti·nide (āk'tə-nī'd)
n.
Any of a series of chemically similar radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
actinides in Science
actinide
  (āk'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
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for actinide

Some English speakers likely know this word

Word Value for actinides

12
14
Scrabble Words With Friends