eta-c particle

American  

noun

1. Physics. a meson with a neutral charge, a mass 5,832 times that of the electron, and an approximate mean lifetime of 3.1 × 10^-22 seconds.

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eta-c particle Scientific  

/ ā′tə-sē′,ē′tə- /

1. An electrically neutral meson having a mass 5,832 times that of the electron and a mean lifetime of approximately 3.1 × 10 ^{- 22} seconds.

2. See Table at subatomic particle

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