filament.
A fine thread or wire.
Meaning & usage
A fine thread or wire.
Such a wire, as can be heated until it glows, in an incandescent light bulb or a thermionic valve.
A massive, thread-like structure, such as those gaseous ones which extend outward from the surface of the sun, or such as those (much larger) ones which form the boundaries between large voids in the universe.
solar filament
galaxy filament
The stalk of a flower stamen, supporting the anther.
A continuous object, limited in length only by its spool, and not cut to length.
A continuous object, limited in length only by its spool, and not cut to length. A spool of plastic used as a material for 3D-printed objects.
Where this word comes from
Etymology tree Proto-Indo-European *gʷʰiH-(s-)lo-der. Proto-Italic *fī(s)lom Latin fīlum Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European *-h₂tiinflu. Proto-Italic *-ājō Proto-Italic *-āō Latin -ō Late Latin fīlō Proto-Indo-European *-mn̥ Proto-Indo-European *-mn̥tom Proto-Italic *-mentom Latin -mentum Medieval Latin fīlāmentumbor. English filament Borrowed from Medieval Latin fīlāmentum, from Late Latin fīlō (“to spin, draw out in a long line”), from Latin fīlum (“thread”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.