† pyroˈbolic,a.Obs.rare—1. [f. pyro- + Gr. βολή a throw + -ic.] (See quot.) (Perh. due to a misunderstanding of parabolic.) 1688R. Holme Armoury iii. xiv. (Roxb.) 12/1 A pyrobolick Mirrour is such a Glass that casts forth fire in a moment of tyme by the suns heat.