1) Anatomical structure 2) Bodily structure 3) Body structure 4) Complex body part 5) Filament 6) Structure 7) Threadlike structure Found on https://www.crosswordclues.com/clue/filum
(fi´lәm) pl. fi´la Latin word meaning a threadlike structure or part. filum terminale a slender, threadlike prolongation of connective tissue from the conus medullaris to the back of the coccyx. Found on http://www.encyclo.co.uk/local/21001