Aircraft that achieve forward propulsion by expelling a stream of fluid are called what?

Aircraft that achieve forward propulsion by expelling a stream of fluid are called "jet aircraft." These aircraft utilize jet engines, which work by sucking in air, compressing it, mixing it with fuel, and igniting the mixture to create a high-speed exhaust that propels the aircraft forward. This principle is known as Newton's third law of motion, where for every action, there is an equal and opposite reaction.