What is "thermionic"

Usage examples of "thermionic".

It was an eternal blackness broken only by thermionic emission emanating from various control instruments.

She turned from one of her biovats from which ten thousand thermionic filaments, circuits of elemental particles suspended in water, emanated like hair from a giant's scalp.

What it developed in that interlude was basic electronics, from simple resistors and capacitors right up to thermionic valves.

At the beginning of the twentieth century came the next major developmentthe thermionic valve, or vacuum tube.

But she'd be dipped in dogshit before she'd believe that the disc was built by a thermionic valve technology.

It was a wirin' diagram, and sair ancient, too, for there were symbols for thermionic valves -- vacuum tubes -- in it.