Greek Capital Letter Omicron

Symbol	Format	Data
Ο	Code Point	U+039F
	TeX	\Omicron
	SVG	Download ↓

The Greek capital letter (capital omnicron) is visually very similar to the upper-case Latin letter O. For that reason, refer to the usage of Capital O for how the symbol appears in math.

Greek Small Letter Omicron | Symbol

The Greek small letter ο (omicron).