interstage

/ˈɪntərˌsteɪdʒ/
noun
  1. A section or component that connects two stages of a multistage rocket.
    • A lightweight interstage helps reduce the overall weight of the launch vehicle.
    • The interstage separates the first and second stages of the rocket after burnout.
    • The engineers inspected the interstage for any cracks before the launch.
adjective
  1. Located or occurring between stages of a process or system.
    • They added an interstage amplifier to boost the signal between the two circuits.
    • The interstage cooling system prevents the engine from overheating.
    • Interstage testing ensures each phase of production meets quality standards.