I. prə-ˈjek-t ə l, -ˌtī(-ə)l, chiefly Brit ˈprä-jik-ˌtī(-ə)l noun
Date: 1665
1. : a body projected by external force and continuing in motion by its own inertia ; especially : a missile for a weapon (as a firearm)
2. : a self-propelling weapon (as a rocket)
II. adjective
Date: 1715
1. : projecting or impelling forward
a projectile force
2. : capable of being thrust forward