A Barretter is a type of tube that is used to regulate the flow of electric current through a circuit. It is also known as a voltage regulator or a current limiter. There are several synonyms that can be used to describe a Barretter, including Voltage Stabilizer, Current Regulator, and Resistance Tube. These terms all refer to the same device and are used interchangeably in technical literature. Other synonyms for Barretter include electron tube, power tube, and vacuum tube. These terms are more general and can be used to describe a variety of electronic components, but they are still related to the Barretter in terms of function.