Omega

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Omega (, ; uppercase Ω, lowercase ω) is the twenty-fourth and last letter of the Greek alphabet. In the Greek numeric system/isopsephy (gematria), it has a value of 800. The name of the letter was originally ( ), but it was later changed to ( 'big o') in the Middle Ages to distinguish it from omicron }}, whose name means 'small o', as both letters had come to be pronounced . In modern Greek, its name has fused into ().

In phonetic terms, the Ancient Greek Ω represented a long open-mid back rounded vowel , in contrast to omicron, which represented the close-mid back rounded vowel , and the digraph }}, which represented the long close back rounded vowel . In modern Greek, both omega and omicron represent the mid back rounded vowel . The letter omega is transliterated into a Latin-script alphabet as or .

As the final letter in the Greek alphabet, omega is often used to denote the last, the end, or the ultimate limit of a set, in contrast to alpha, the first letter of the Greek alphabet, as in the phrase Alpha and Omega. Provided by Wikipedia