vacuum tube vacuum trap • vacuum tube rectifier · · · Info · Definitions · Synonyms · Characters · · vacuum tube · · Text Common · · Latin · · Scripts 11 · · Length Definitions · · · (noun) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope. Synonyms: tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve. · · Noun Definition 1 Synonyms · · · vacuum · · Synonym 1 vacuity · · Synonym 2 void · · Synonym 3 vacancy · · Synonym 4 emptiness · · Synonym 5 vacuum cleaner · · Synonym 6 vacuum-clean · · Synonym 7 hoover · · Synonym 8 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 m latin small letter m U+006D t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076