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ombudsperson
ombudswoman
Omdurman
-ome
omega
omega-3
omega-6 oil
omega hyperon
omega meson
omega minus
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omega meson
o·me·ga mes·on (plural o·me·ga mes·ons)


noun 
Definition:
 
subatomic particle: an extremely short-lived neutral meson with a rest mass 1,532 times that of an electron
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