Filament

Filament may refer to:

In physics and electrical engineering:
 * Electrical filament
 * Current filament
 * Filament propagation, diffractionless propagation of a light beam

In astronomy:
 * Galaxy filament
 * Solar filament, a structure in a solar corona
 * Birkeland current

In biology:
 * Protein filament
 * Filamentation, a long chain of cells
 * Part of a stamen, the male part of a flower
 * Hypha, in fungi and Actinobacteria

Other uses:
 * Fiber or yarn
 * 2002 movie by Jinsei Tsuji