| Engelsk navneord: thermionic valve | 
| 1. | thermionic valve (om genstand) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope | 
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 | Termer med samme betydning (synonymer) | electron tube, thermionic tube, thermionic vacuum tube, tube, vacuum tube | 
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 | Mindre specifikke termer | electronic device | 
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 | Mere specifikke termer | acorn tube, diode, electron multiplier, gas-discharge tube, klystron, magnetron, pentode, rectifying tube, rectifying valve, television pickup tube, television-camera tube, tetrode, triode, X-ray tube | 
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 | Omfatter disse specifikke termer | anode, cathode, control grid, electrode, grid, plate | 
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 | Omfatter disse overordnede termer | circuit, electric circuit, electrical circuit | 
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