Part of speech: noun

A fine thread or fiber.

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Usage examples "filament":

  1. The audion is a glass bulb like an electric light bulb which has in it a thread, or filament, of metal. - "Letters of a Radio-Engineer to His Son", John Mills.
  2. His efforts to trace to definite result some filament of fact that might prove the court- martial to have reached a conclusion at variance with the truth, had all ended in failure. - "The Law of Hemlock Mountain", Hugh Lundsford.
  3. This does not seem strange when we reflect that every minute filament, the grain, the knots, spots, dents, and finger- marks are all reproduced. - "Holland, v. 1 (of 2)", Edmondo de Amicis.