Definitions for "Cold cathode"
Keywords:  neon, cathode, electrode, lamp, nixie
The technical name for all forms of pumped gas, e.g., neon lighting. In the United States this term is typically used to refer to 18mm to 25mm tubing operating at currents between 60mA and 240mA. These neon lights also have electrodes that depend on a large emission surface area rather than high temperature for their operation.
A cathode, in an electron tube or lamp, which emits electrons without having to be heated.
a lamp very similar to a neon lamp