gammaPronunciation: /ˈgamə/Definition of gamma noun 1the third letter of the Greek alphabet (Γ, γ), transliterated as ‘g’. The combinations γγ, γκ, and γχ are usually transliterated as ‘ng’, ‘nk’, and ‘nkh’ or ‘nch’ [as modifier] denoting the third in a series of items, categories, etc.: the alpha, beta, gamma system of share classification British a third-class mark given for an essay or other piece of work. (Gamma) [followed by Latin genitive] Astronomy the third (usually third-brightest) star in a constellation:Gamma Orionis 2 [as modifier] relating to gamma rays:gamma detector 3 Physics (plural same) a unit of magnetic field strength equal to 10−5 oersted. Origin:via Latin from Greekgamma in other Oxford dictionaries Definition of gamma in the US English dictionary
