'Hittorf tube' definitions:

Definition of 'Hittorf tube'

From: GCIDE

Hittorf tube \Hit"torf tube\ (Elec.) (a) A highly exhausted glass tube with metallic electrodes nearly in contact so as to exhibit the insulating effects of a vacuum. It was used by the German physicist W. Hittorf (b. 1824). (b) A Crookes tube. [Webster 1913 Suppl.]