|a source of light that contains a heated solid, such as an electrically heated filament|
|incandescent lamp (ĭn'kən-děs'ənt) Pronunciation Key
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A lamp that produces light by heating up a filament of wire inside a bulb with an electric current, causing incandescence. The glass bulb containing the filament is filled with a nonreactive gas, such as argon, to prevent the wire from burning. Compare fluorescent lamp.