electron gun electron gas • electron microscope · · · Info · Definitions · Synonyms · Characters · · electron gun · · Text Common · · Latin · · Scripts 12 · · Length Definitions · · · (noun) the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it. · · Noun Definition 1 Synonyms · · · electron · · Synonym 1 negatron · · Synonym 2 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075