thermionic.

Relating to electrons released from a heated material.

Use it for

Words that belong together

• thermionic emission
• a thermionic device

On the page

The thermionic emitter needed time to warm before the signal stabilized.

Usage notes

Primary category: sci-fi. Forms: Normally non-gradable; no ordinary comparative or superlative. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, setting. Commonness: uncommon.