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antimatter

[an-tee-mat-er, an-tahy-] /ˈæn tiˌmæt ər, ˈæn taɪ-/
noun, Physics.
1.
matter composed only of antiparticles, especially antiprotons, antineutrons, and positrons.
Origin
1950-1955
1950-55; anti- + matter
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for anti matter's

antimatter

/ˈæntɪˌmætə/
noun
1.
a form of matter composed of antiparticles, such as antihydrogen, consisting of antiprotons and positrons
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
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Word Origin and History for anti matter's

antimatter

n.

also anti-matter, 1953, from anti- + matter (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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anti matter's in Science
antimatter
  (ān'tĭ-māt'ər)   
A form of matter that consists of antiparticles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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anti matter's in Culture

antimatter definition


In physics, matter made of antiparticles.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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