omega hyperon[ō′meg·ə ′hī·pə‚rän]
A semistable baryon with a mass of approximately 1672 MeV, negative charge, spin of ³⁄₂, and positive parity; constitutes an isotopic spin singlet. Also known as omega particle. Symbolized Ω-.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.