I. ōˈmegə, -ˈmēgə, -ˈmāgə sometimes ˈōmigə or ˈōmēgə or ˈōˌmegə or ˈōˌmāgə noun
( -s )
Etymology: Greek ō mega, literally, large o
1. : the 24th and last letter of the Greek alphabet — symbol Ω or ω; see alphabet table
2. : the last (as in sequence, order, classification) : ending
between her alpha and omega , a span of fifty years — Jean Stafford
— compare alpha
II. adjective
or ω
: of, relating to, or being an end group or position
omega oxidation of fatty acids
ω-chloro-styrene C 6 H 5 CH . CHCl
III. noun
1. or omega minus or omega particle : a negatively charged elementary particle that has a mass 3272 times the mass of an electron and that is an unstable baryon with an average lifetime of about 10 -10 second
2. or omega meson : a very short-lived unstable meson with mass 1532 times the mass of an electron