Omega-meson
noun, Physics.
1.
a neutral and extremely short-lived meson having a mass 1532 times that of the electron and a mean lifetime of 6.6 X 10 -23 seconds.
omega meson
A neutral meson having a mass 1,532 times that of the electron and an average lifetime of 6.6 × 10-23 seconds. See Table at subatomic particle.
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