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chi particle

[ kī, kē ]
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An electrically neutral meson having a mass 6,687 times that of the electron and a mean lifetime of approximately 1.5 X 10-20 seconds. See Table at subatomic particle.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

How to use chi particle in a sentence

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