The term 'PYROTECHNIC' is related to fireworks and is an 11-letter word. Pyrotechnics is the science of using materials capable of undergoing self-contained and self-sustained exothermic chemical reactions for the production of heat, light, gas, smoke and/or sound. It is used in fireworks displays, special effects in theater, film and television, and in military and recreational applications. Pyrotechnics can also be used to create a variety of effects such as sparks, flames, smoke, and loud noises.