The term 'Gas Regulator' refers to a VALVE that is used to control the flow of gas in a system. It is typically used to regulate the pressure and flow of gas in a system, ensuring that the gas is delivered at a consistent rate. The crossword solution for this term is 'VALVE, ' which is a device that is used to control the flow of a fluid or gas. Valves are often used to regulate the pressure and flow of a gas or liquid, allowing for precise control over the flow of the substance.