firework, pyrotechnic -- ((usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.)
Overview of adj pyrotechnic
The adj pyrotechnic has 2 senses
pyrotechnic, pyrotechnical -- (of or relating to the craft of making fireworks; "pyrotechnic smokes")
pyrotechnic -- (suggestive of fireworks; "pyrotechnic keyboard virtuosity"; "a pyrotechnic wit")