Definitions of pyrotechnic:

• noun:   (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.
• adjective:   suggestive of fireworks

  Example: "Pyrotechnic keyboard virtuosity"

• adjective:   of or relating to the craft of making fireworks

  Example: "Pyrotechnic smokes"