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antiatom

   Also found in: Wikipedia 0.06 sec.
an·ti·at·om  (nt-tm, nt-)
n.
An atom composed of antiparticles.

antiatom  (nt-tm, nt-)
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.


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Scientists couldn't study their properties, however, because the antiatoms were traveling at nearly light speed and were almost instantly annihilated by contact with matter.
Creating a single antiatom was difficult - and for now, scientists say, making the millions needed for rocket fuel is impossible.
However, the antiatoms created at CERN and Fermilab travel far too quickly and don't last long enough for researchers to measure their characteristics.
 
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