The word filament, which is descended from Latin filum meaning "thread", is used in English for a variety of thread-like structures, including:
Astronomy Galaxy filament, the largest known cosmic structures in the universe Solar filament, a solar prominence seen against the disc of the sun
Biology Myofilament, filaments of myofibrils constructed from proteins Protein filament, a long chain of protein subunits, such as those found in hair or muscle Part of a stamen, the male part of a flower Hypha, a thread-like cell in fungi and Actinobacteria Filamentation, an elongation of individual bacterial cells
Textiles Filament fiber, fiber that comes in a continuous long length Filament yarn, as opposed to spun yarn
Arts and entertainment Filament (band), a musical group from Japan Filament (film), a 2002 movie by Japanese director Jinsei Tsuji Filament (magazine), a female-oriented erotica magazine Filament Games, a Wisconsin-based educational video game developer Filament Productions, a production design and touring video company
Physics and engineering Electrical filament of incandescent light bulb Heater filament of a vacuum tube Current filament, an inhomogeneity in current flow Filament propagation, diffractionless propagation of a light beam LED filament, a light-emitting diode string, which resembles an incandescent light bulb filament 3D printing filament, printer raw material
See also Monofilament (disambiguation)