cathode ray cathode particle • cathode-ray oscillograph · · · Info · Definitions · Characters · · cathode ray · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) a beam of electrons emitted by the cathode of an electrical discharge tube. Synonyms: cathode ray. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079