English > vacuum tube: 1 sense > noun 1, artifact| Meaning | electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope. |
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| Synonyms | tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve |
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| Part of | circuit, electrical circuit, electric circuit | An electrical device that provides a path for electrical current to flow |
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| Parts | anode | A positively charged electrode by which electrons leave an electrical device |
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| cathode | A negatively charged electrode that is the source of electrons entering an electrical device |
| electrode | A conductor used to make electrical contact with some part of a circuit |
| grid, control grid | An electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube |
| plate | The positively charged electrode in a vacuum tube |
| Narrower | X-ray tube | A vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays |
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| acorn tube | A small vacuum tube |
| diode, rectifying tube, rectifying valve | A thermionic tube having two electrodes |
| electron multiplier | A vacuum tube that amplifies a flow of electrons |
| gas-discharge tube | A tube in which an electric discharge takes place through a gas |
| klystron | An electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation |
| magnetron | A diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields |
| pentode | A thermionic tube having five electrodes |
| television-camera tube, television pickup tube | A tube that rapidly scans an optical image and converts it into electronic signals |
| tetrode | A thermionic tube having four electrodes |
| triode | A thermionic vacuum tube having three electrodes |
| Broader | electronic device | A device that accomplishes its purpose electronically |
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| Spanish | tubo, válvula termoiónica |
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| Catalan | tub de buit, vàlvula de buit, vàlvula |
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