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.
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Also called D-s particle.
Origin of D-s meson
First recorded in 1980–85
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020