| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Hot cathode | Aerospace | A cathode that functions primarily by the process of thermionic emission. Also called thermionic cathode. (references) | |
| Hot cathode | Electrical Engineering | A cathode that must be heated to produce the desired thermionic emission. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
