eta-c particle
[ ā′tə-sē′, ē′tə- ]
An electrically neutral meson having a mass 5,832 times that of the electron and a mean lifetime of approximately 3.1 X 10-22 seconds. See Table at subatomic particle.
Words Nearby eta-c particle
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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