Definition of light bulb
: an electric lamp: such asa : one in which a filament gives off light when heated to incandescence by an electric current —called also incandescent, incandescent lampb : fluorescent lamp
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Illustration of light bulb
First Known Use of light bulb
1884
LIGHT BULB Defined for Kids
light bulb
noun
Definition of light bulb for Students
: a lamp in which a glow is produced by the heating of a wire by an electric current
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