超ちょう音おん速そく輸ゆ送そう機き

noun

supersonic transport; SST

Technical term for an aircraft designed to fly faster than the speed of sound, typically used in aviation and engineering contexts.

• 超ちょう音おん速そく輸ゆ送そう機きの開かい発はつには莫ばく大だいな費ひ用ようがかかる。

  Developing a supersonic transport aircraft requires enormous costs.