glow tube glow meter • glower · · · Info · Definitions · Characters · · glow tube · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) a gas-discharge tube consisting of a cold cathode and a diode in a tube filled with gas; the color of the glow depends on the particular gas. Synonyms: glow tube. · · Noun Definition 1 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C o latin small letter o U+006F t latin small letter t U+0074 u latin small letter u U+0075 w latin small letter w U+0077