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'Gamma' (uppercase 'Γ', lowercase 'γ') is the third letter of the Greek alphabet. In the system of Greek numerals it has a value of 3. It was derived from the Phoenician letter Gimel . Letters that arose from Gamma include the Roman C and G and the Cyrillic letters Ge Г and Ghe Ґ.
In Modern Greek, it represents either a voiced velar fricative or a voiced palatal fricative . In Ancient Greek, it represented a voiced velar stop . Before velars, it represents a velar nasal in Modern as well as Ancient Greek, and a double gamma represents a prenasalized voiced velar stop ().

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Use as a symbol or a term

Use as a symbol or a term

Main articles: Gamma (disambiguation)

Gamma is often used to denote a variable in mathematics and physics.
In certain areas it has a specific meaning, such as representing gamma radiation, such as gamma waves.