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

Gimel

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 ().

Gamma combinations

The gamma can be combined with other letters or itself.

• A double gamma (??) is pronounced like the ng in "jumping"
• A gamma with xi (??) is pronounced roughly like the nx in "Sphinx"
• A gamma with chi (??) is pronounced like the nkh in "ankh"
• A gamma combined with kappa (??) is pronounced like the nk in "banker"

Use as a symbol or a term

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 in nuclear physics and the Lorentz factor in theory of relativity. In mathematics, there is a gamma function (usually written as ?-function.)

als:? ar:???? arc:? ast:Gamma br:Gamma (lizherenn) bg:???? (?????) ca:Gamma cy:Gamma da:Gamma (bogstav) de:Gamma el:????? es:? eo:Gamo (litero) ext:Gama eu:Gamma (greko) fr:Gamma ga:Gáma gv:Gamma gd:Gamma gl:Gamma ko:? hr:Gama id:Gamma (huruf Yunani) is:Gamma it:Gamma (lettera) he:??? (???) ka:???? (???) sw:Gamma ht:? ku:Gamma la:Gamma lt:Gama (raid?) hu:Gamma ms:Gama nah:? nl:Gamma (letter) ja:? no:Gamma nn:Gamma nds:Gamma pl:Gamma pt:? ru:????? (?????) simple:Gamma sk:Gama (grécke písmeno) sl:Gama sr:???? sh:Gama fi:Gamma sv:Gamma th:????? tr:? uk:????? (??????) zh:?