The Collaborative International Dictionary
firework \fire"work`\ (f[imac]r"w[^u]rk`), n.
A device for producing a striking display of light, or a figure or figures in plain or colored fire, by the combustion of materials that burn in some peculiar manner, as gunpowder, sulphur, metallic filings, and various salts; also called a pyrotechnic device. The most common feature of fireworks is a paper or pasteboard tube filled with the combustible material. A number of these tubes or cases are often combined so as to make, when kindled, a great variety of figures in fire, often variously colored. The skyrocket is a common form of firework. The art of designing fireworks for purposes of entertainment is called pyrotechnics. The name firework is also given to various combustible preparations used in war.
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pl. A pyrotechnic exhibition; an entertainment consisting of the discharge of fireworks[1]. [Obs. in the sing.]
Night before last, the Duke of Richmond gave a firework.
--Walpole.
Usage examples of "pyrotechnic device".
The package was x-rayed immediately and found to contain a battery and some wires, plus a semi-opaque rectangle that collectively represented a pyrotechnic device.
I told you so was as dangerous as defusing any other pyrotechnic device.
On the other hand, the heat of the pyrotechnic device blazed like a beacon on the infrared display, and they could see their man.
Unless she'd been to the little clearing earlier, she couldn't have rigged some kind of pyrotechnic device.