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pyrotechny (n.)

1570s, "the management and mechanical application of fire" (a sense now obsolete); 1630s, "the fabrication of fireworks for military and commercial purposes," from pyro- "fire" + Latinized form of Greek tekhnē "art" (see techno-). 

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Definitions of pyrotechny from WordNet

pyrotechny (n.)
the craft of making fireworks;
Synonyms: pyrotechnics
From wordnet.princeton.edu