Definition

Relating to the release of electrons from a heated material or electrode.

Example

The thermionic effect is essential in the operation of vacuum tubes.

Conversation

Have you ever heard of thermionic emission?

I think I read about it in a science article once.

It's fascinating how it involves electrons from hot materials.

Yeah, it really shows how heat can affect electricity!

Synonyms & Antonyms

Root Explanation

Thermionic → It is formed from "thermo-" (from Greek "thermos", meaning heat) and "ionic" (from Greek "ion", meaning going or to go). The word describes the phenomenon of electrons being emitted from a heated material, thus relating to heat and the movement of ions.

Memory Tip

Think of 'heat' ('thermo-') causing particles to 'go' ('ionic') — that's how thermionic relates to the emission of electrons due to heat.

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