2. Botany.
a. The stalk that bears the anther in a stamen.
b. A chainlike series of cells, as in many algae.
3.
a. A fine wire heated electrically to incandescence in an electric lamp.
b. Electronics. A high-resistance wire or ribbon forming the cathode in some thermionic tubes.
"In some firm fabric, woven in and out;
Your golden filaments in fair design
Across my duller fibre."
—Edna St. Vincent Millay, “Interim”