- a neutral and extremely short-lived meson having a mass 1532 times that of the electron and a mean lifetime of 6.6 X 10-23 seconds.
Also called omega.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A neutral meson having a mass 1,532 times that of the electron and an average lifetime of 6.6 X 10-23 seconds. See Table at subatomic particle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.