filament

nounB1

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noun

Plural noun:

filaments

1.
A fine thread or wire.
2.
Such a wire, as can be heated until it glows, in an incandescent light bulb or a thermionic valve.
3.
(physics, astronomy) 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 Ursa Major Filament
4.
(botany) The stalk of a flower stamen, supporting the anther.
5.
(textiles) A continuous object, limited in length only by its spool, and not cut to length.

Borrowed from fīlāmentum, from fīlō (to spin, draw out in a long line), from Latin fīlum (thread).