flashbulb ( synonym found)
Definition of flashbulb:

(n) : 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 flashbulb:

(n) : 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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