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Olympus Mons
Olympus, Mount
Om
om
-oma
OMA
Omagh
Omaha (1)
Omaha (2)
Oman
Oman, Gulf of
omasum
Omayyad
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ombre
ombrogenous
ombudsman
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omega hyperon
o·me·ga hy·per·on (plural o·me·ga hy·per·ons)


noun 
Definition:
 
subatomic particle: a negatively charged elementary particle with a rest mass 3,272 times that of an electron
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