pyroballogy

A variant of pyrobology, from pyro- (prefix meaning ‘fire, heat’) (from Ancient Greek πῦρ (pûr, “fire; lightning”)) + Ancient Greek βάλλειν (bállein, “to throw”) + -logy (suffix indicating a branch of learning or study of a particular subject) (from Ancient Greek -λογῐ́ᾱ (-logĭ́ā), from λόγος (lógos, “word, speech; reason, reckoning; account, explanation”)). βάλλειν is derived from βᾰ́λλω (bắllō, “to hurl, throw; to strike, touch”), ultimately from Proto-Indo-European *gʷelH- (“to pierce; to throw, to hit by throwing”).

来源：wiktionary