"Jet airplanes" refers to a type of aircraft that uses jet engines to fly. These engines produce a strong and fast flow of air, allowing the plane to travel at high speeds. Full definition
That's what well - paid people who fly around the world in huge jet airplanes keep threatening. (globalclimatescam.com)
The study marks the first time scientists have quantified the viruses being swept up from the Earth's surface into the free troposphere, that layer of atmosphere beyond Earth's weather systems but below the stratosphere where jet airplanes fly. (sciencedaily.com)
Another huge opportunity would be to use either NASA itself or something akin to NASA to develop hydrogen - powered jet airplane engines. (qz.com)