negative glow

noun

, Physics.

1. the luminous region between the Crookes dark space and the Faraday dark space in a vacuum tube, occurring when the pressure is low.

Word History and Origins

Origin of negative glow¹

First recorded in 1885–90

Example Sentences

To obtain a negative glow in air at common pressures is difficult.

From Project Gutenberg

Next this we have a luminous position called the “negative glow” or the “third cathode layer.”

From Project Gutenberg