| Answer | Crossword Clue |
|---|---|
| thermionics | THERMIONIC |
| ANODE | Thermionic tube part |
| thermionics | The branch of science and technology concerned with thermionic emission |
| thermoelectron | an electron emitted at high temperature, such as one produced in a thermionic valve |
| thermoelectrons | THERMOELECTRON, an electron emitted at high temperature, such as one produced in a thermionic valve |
