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Vinony

ramjet

noun

  1. jet engine that uses the engine's forward motion to compress incoming air
L326336 on Wikidata ↗

Wiktionary

noun

Etymology: From ram + jet.

  1. 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.