lightbulb
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light·bulb

noun \ˈlīt-ˌbəlb\

Definition of LIGHTBULB

: an electric lamp: as
a : one in which a filament gives off light when heated to incandescence by an electric current —called also incandescent, incandescent lamp
b : fluorescent lamp

Illustration of LIGHTBULB

First Known Use of LIGHTBULB

1884

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