Cold cathode is a term commonly used in the field of lighting and electronic devices to refer to a type of cathode that operates at a low temperature. However, there are several synonyms for this term that are often used interchangeably in different contexts. Examples of synonyms for cold cathode include gas discharge lamp, neon lamp, and fluorescent lamp. These terms often refer to the same type of device, which uses a gas-filled tube and a low-voltage discharge to produce light. Other synonymous terms include cold cathode fluorescent lamps (CCFLs), which are commonly used in LCD displays, and cold cathode emitters, which are used in high-power radio frequency amplifiers.