x-ray tube x-ray therapy • x-raying · · · Info · Definitions · Characters · · x-ray tube · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (noun) a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays. Synonyms: X-ray tube. · · Noun Definition 1 Characters · · space U+0020 - hyphen-minus U+002D a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 x latin small letter x U+0078 y latin small letter y U+0079