• WordNet 3.6
    • n filum a threadlike structure (as a chainlike series of cells)
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Century Dictionary and Cyclopedia
    • n filum A thread; a filament, fibril, or fine fiber; a filar structure.
    • n filum In musical notation, the stem or tail of a note.
    • n filum A hair-like process on the radius of the down-feathers in some birds.
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In literature:

Latin filum, French file = a row.
"Anson's Voyage Round the World" by Richard Walter
Filume'na= or FILOMENA, a new saint of the Latin Church.
"Character Sketches of Romance, Fiction and the Drama" by E. Cobham Brewer