U03C9

U+03C9 denotes the Greek small letter omega, the 24th and final letter of the Greek alphabet. It is written as ω, with the uppercase counterpart Ω. The name omega means “great O,” in contrast to omicron, meaning “small O.”

In Greek, omega represents the long o sound and appears in many words in both ancient and modern usage. As the last letter of the alphabet, it also carries symbolic associations in various disciplines.

In mathematics and related fields, ω and Ω are used in notation for growth and bounds. The uppercase Omega (Ω) denotes a lower bound in asymptotic notation, while the lowercase omega (ω) can denote a non-tight lower bound or a function that grows faster than another, depending on the convention. In physics and engineering, the symbol ω is widely used for angular frequency, related to ordinary frequency f by ω = 2πf; it appears in equations describing oscillations, waves, and rotating systems.

In electronics, the uppercase Greek Omega is the symbol associated with the ohm, the unit of electrical resistance, though the unit is typically written with the Ω symbol. In digital typography, U+03C9 is encoded in UTF-8 as E2 8F 89 and can be represented in HTML with the entity ω.

Fonts and typefaces may render ω with slight stylistic variations, and its similarity to certain Latin characters can cause confusion in some contexts. Overall, omega serves as a versatile symbol across language, science, and mathematics.