omega meson
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omega meson
n.
A neutral vector meson having a mass 1,532 times that of an electron and a mean lifetime of 7.7 × 10-23 second.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.