| 释义 |
omega
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 C6H5CH . 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 |