Dictionary.com
definitions

D-s meson

noun Physics.

a positively charged meson having a mass 3852 times that of the electron and a mean lifetime of approximately 4.7 X 10-13 seconds.

RELATED CONTENT

Become A (Dungeon) Master Of These D&D Slang TermsFor the over 50 years that D&D has been around, a lot of jargon has developed around the game. Whether you're a total n00b or a Dungeon Master, knowing the lingo of D&D is a key part (of the fun) of its gameplay.
READ MORE
What’s The #’s Real Name?How do we currently use the # symbol? On Twitter, Facebook, and Instagram, you tag your friends with the @ symbol and you tag topics with the #. If you see something that says “#WordoftheDay,” the tweet or post has something to do with Word of the Day. And, once you click on that marked topic, you’ll likely see all public posts about it. It’s a …
READ MORE
Also called D-s particle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for d-s particle

D-s particle

[ dē′ĕs′ ]

A positively charged meson having a mass 3,852 times that of the electron and a mean lifetime of approximately 4.7 X 10-13 seconds. See Table at subatomic particle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.