Such a wire, as can be heated until it glows, in an incandescent light bulb or a thermionic valve.
Other Word Forms of Filament
Origin of Filament
New Latin fīlāmentum from Late Latin fīlāre to spin from Latin fīlum thread gwhī- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
From Medieval Latin filamentum, from Late Latin filare (“to spin, draw out in a long line”), from Latin filum (“thread”)
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