Οο Omicron was a letter in the Greek alphabet of Earth, originating in the early period of Human history.
It was used in the following contexts:
- Astronomical nomenclature
- Alpha Omicron system
- Alpha Omicron asteroid belt
- Alpha Omicron VII, a planet
- Omicron Ceti, a star
- Omicron Ceti III (aka Omicron III), a planet
- Omicron Delta region
- Omicron Gruis, a star system
- Omicron Leonis, a star
- Omicron Pascal, a location
- Omicron Seti III, a planet
- Omicron Theta star system
- Omicron system
- Omicron IV, a planet
- Theta Omicron IV, a planet
- Vega-Omicron sector
- Chemistry
- Omicron band
- Omicron particle / omicron radiation
- Starfleet terminology
- "Omicron-omicron-alpha-yellow-daystar 2-7", a Starfleet command authorization code in 2365
- "Omicron theta", a subspace sensor band
- Retconned references