[oh-mee-guh-see, oh-mey-, oh-meg-uh-]
- a neutral baryon having a mass 5292 times that of the electron and a mean lifetime of approximately 6.4 X 10-14 seconds.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- An electrically neutral baryon having a mass 5,292 times that of the electron and an average lifetime of approximately 6.4 X 10-14 seconds. See Table at subatomic particle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.