Ω U+03A9, Ω
Greek and Coptic Ϊ
U+2126, Ω

Letterlike Symbols

Translingual edit

Symbol edit


  1. The symbol for ohm, the unit of electrical resistance in the International System of Units.

Usage notes edit

The Unicode Standard states that Ω (U+2126 OHM SIGN) is included in Unicode only for backward compatibility reasons. To represent ohms, Ω (U+03A9 GREEK CAPITAL LETTER OMEGA) is preferred.

Derived terms edit

Symbol for ohm

See also edit

Ancient Greek edit

Etymology edit

The most common uppercase form   is a variant of omicron (Ο), broken up at the side ( ), with the edges subsequently turned outward ( ,  ,  ,  ). The alternative uppercase form, found in some typefaces, that looks like a larger version of lowercase ω, is from a digraph of two omicrons written close together.

Letter edit

Ω (Ō) (uppercase, lowercase ω)

  1. The letter omega (ὦ μέγα), the 24th letter of the ancient Greek alphabet.

Derived terms edit

See also edit

Greek edit

Letter edit

Ω (O) (uppercase, lowercase ω)

  1. The upper case letter omega (ωμέγα), the last letter of the modern Greek alphabet.
  2. The upper case letter omega (Ω) is used as the mathematical notation or symbol for the last place in a set or group of items.

Numeral edit

Ω (O)

  1. The number 800 in Greek numerals.
  2. The number 800,000 in Greek numerals.

See also edit

see: Appendix:Greek alphabet