adjective Etymology: thermion charged particle from an incandescent source, from therm- + ion Date: 1909 relating to, using, or being the emission of charged particles (as electrons) by an incandescent material
THERMIONIC
Meaning of THERMIONIC in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012