from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A threadlike anatomical structure; a filament.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a filamentous anatomical structure

from The Century Dictionary and Cyclopedia

  • n. A thread; a filament, fibril, or fine fiber; a filar structure.
  • n. In musical notation, the stem or tail of a note.
  • n. A hair-like process on the radius of the down-feathers in some birds.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a threadlike structure (as a chainlike series of cells)


Latin fīlum, thread; see gwhī- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin fīlum ("thread"). (Wiktionary)



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