Hypernyms:electron tube thermionic tube thermionic vacuum tube thermionic valve tube vacuum tube
Inherited Hypernyms:gas-discharge tubetubeelectronic devicedeviceinstrumentalityartifactwholeobjectphysical entityentity
Direct Hyponyms:CRTcathode-ray tubeglow lampglow tube
Full Hyponyms:
cathode-ray tubecolor tubecrookes tubeglow lampglow tubekinescopetricolor television tube