trajectory
tra.jec.to.ry \tr*-'jek-t(*-)re-\ n [NL trajectoria, fr. fem. of trajectorius of passing, fr. L traj]ectus, pp. of traicere to cause to cross, cross, fr. trans-, tra- trans- + jacere to throw - more at JET : the curve that a body (as a planet or comet in its orbit, a projectile i n passing from muzzle to first point of impact, or a rocket) describes in space