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antiatom

[an-tee-at-uh m, an-tahy-] /ˈæn tiˌæt əm, ˈæn taɪ-/
noun, Physics.
1.
an atom of antimatter.
Origin of antiatom
1965-1970
1965-70; anti- + atom
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for anti-atom

anti-atom

noun
1.
an atom composed of antiparticles, in which the nucleus contains antiprotons with orbiting 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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anti-atom in Science
antiatom
  (ān'tē-āt'əm, ān'tī-)   
An atom composed of antiparticles. An antiatom consists of positrons, antiprotons, and antineutrons. It has the same mass and spin as an ordinary atom, and the same amount of charge and magnetic moment, but the charge and magnetic moment are the opposite of those of an ordinary atom.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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