(aeronautics) A jet engine in which forward motion forces air into an inlet, compressing it (as opposed to having a pump type device compressing the air for combustion with fuel), and where combustion is subsonic.

plural of ramjet

(astronautics) A fusion rocket that gathers fuel from the interstellar medium through attraction via a magnetic field, functioning akin to a regular ramjet.

plural of Bussard ramjet

plural of turbo-ramjet

A turbine-based combined-cycle ramjet engine (an aeroengine that has a turbine jet engine core combined with a ramjet engine core)