thermionic valve (US ,thermionic `tube)

vacuumtube in which a flow of electrons is emitted by heated electrodes, used in the receiving of radio signals, etc 热离子管.

there and then, thereabouts, thereafter, thereby, therefor, therefore, therefrom, therein, thereinafter, thereof, thereon, thereto, thereunder, thereupon, therewith, therm, therm(o)-, thermal, thermal capacity, thermionic, thermocouple, thermodynamics, thermoelectric, thermometer, thermometre, thermonuclear, thermoplastic, Thermos, thermosetting, thermostat, thermostatic, thermostatically, thesaurus, these, thesis, Thespian, Thespian (also thespian), they, they'd, they'll,