d-s particle

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.
Also called D-s particle.
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American Heritage
Science Dictionary
D-s particle   (dē'ěs')  Pronunciation Key 
A positively charged meson having a mass 3,852 times that of the electron and a mean lifetime of approximately 4.7 × 10-13 seconds. See Table at subatomic particle.
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