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physics the thin wire inside a light bulb
an object that produces light, especially one that fits into an electric light. A light bulb is often simply called a bulb.
the part of a light that is fixed to the wall or ceiling, where you put the light bulb
an object fixed to a wall for holding a light or a candle
a place where you can fit a light bulb
the part inside an oil lamp that burns to produce light or heat