Greek Small Letter Omega ω

The Greek Small Letter Omega character (ω) is a standard HTML entity defined in the HTML specification. In HTML source code, it can be written using the named entity reference ω, the decimal numeric character reference ω, or the hexadecimal numeric reference ω. The character is assigned Unicode code point U+03C9 in the Universal Character Set.

Omega is the twenty-fourth and final letter of the Greek alphabet, symbolizing the end or the ultimate. In physics, lowercase omega represents angular velocity and angular frequency. The uppercase Ω represents electrical resistance in ohms. Alpha and omega together represent 'the beginning and the end.'

Greek letter entities are indispensable for scientific papers, engineering documentation, statistical analyses, and mathematical content published on the web. From physics equations using alpha and omega to statistical formulas featuring sigma and mu, these entities allow content authors to include Greek characters reliably without requiring specialized fonts or complex Unicode input methods on the keyboard.

When deciding how to encode the Greek Small Letter Omega character in your HTML documents, the named entity ω is generally the most readable choice for developers reviewing or maintaining source code. The decimal form ω and hexadecimal form ω are equally valid alternatives that work in contexts where named entities may not be supported, or when generating HTML output programmatically from server-side code. All three representations produce identical visual output in every modern web browser.

Use the omega entity in physics (angular velocity ω, angular frequency), and metaphorical content about finality or completeness. For electrical resistance in ohms, use capital omega (Ω). The alpha-omega pair has deep cultural significance in theology and philosophy.