filament

What Is The Meaning Of Filamentous? Definitions of filamentous. adjective. thin in diameter; resembling a thread. synonyms: filamentlike, filiform, threadlike, thready thin. of relatively small extent from one surface to the opposite or in cross section. What does filament mean in a flower? filament. [ fĭl′ə-mənt ] A fine or slender thread, wire, or fiber.