photoflash bulb ( synonym found)
Definition of photoflash bulb:

°A glass bulb, filled with finely shredded magnesium, that emitted a short, intense flash of light when ignited by electricity; could be used only once.
Definition of photoflash bulb:

°A glass bulb, filled with finely shredded magnesium, that emitted a short, intense flash of light when ignited by electricity; could be used only once.
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