fil·a·ment (f l  -mnt)n. 1. A fine or thinly spun thread, fiber, or wire. 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. [New Latin f  l mentum, from Late Latin flre, to spin, from Latin flum, thread; see gwh- in Indo-European roots.]fil  a·mentous (-m nts), fila·menta·ry (-mnt-r , -mntr) adj. |
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