411 REFERENCE · Wiktionary
Crookes space
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
After Sir William Crookes, English chemist, who first described it.
Noun
en physics dated The dark space within the negative-pole glow at the cathode of a vacuum tube, observed only when the pressure is low enough to give a striated discharge.
Synonyms
en Crookes layer
en eponyms