follow Dictionary.com

Why is the ninth month called September?

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
Examples for actinide
  • And if you pack together enough of certain actinide atoms, their nuclei will erupt in a powerful release of energy.
  • The actinide series derives its name from the first element in the series, actinium.
  • New methods were implemented to improve the actinide method for urine.
  • The first step of this modeling is a proper description of the actinide complex.
British Dictionary definitions for actinide

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
actinide 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
actinide 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 actinide

11
13
Scrabble Words With Friends