prelaunch

pre·launch

P0523900 (prē′lônch′, -lŏnch′)adj. Preparatory or preliminary to launch, especially of a spacecraft or missile.

prelaunch

(priːˈlɔːntʃ) adjof the period before a launch

pre•launch

(priˈlɔntʃ, -ˈlɑntʃ)

adj. preparatory to launch, as of a spacecraft. [1960–65]