nt]
| 1. | a very fine thread or threadlike structure; a fiber or fibril: filaments of gold. |
| 2. | a single fibril of natural or synthetic textile fiber, of indefinite length, sometimes several miles long. |
| 3. | a long slender cell or series of attached cells, as in some algae and fungi. |
| 4. | Botany. the stalklike portion of a stamen, supporting the anther. |
| 5. | Ornithology. the barb of a down feather. |
| 6. | (in a light bulb or other incandescent lamp) the threadlike conductor, often of tungsten, in the bulb that is heated to incandescence by the passage of current. |
| 7. | Electronics. the heating element (sometimes also acting as a cathode) of a vacuum tube, resembling the filament in an incandescent bulb. |
| 8. | Astronomy. a solar prominence, as viewed within the sun's limb. |
filament fil·a·ment (fĭl'ə-mənt)
n.
A fibril, fine fiber, or threadlike structure.