noun

1. 1. a slender, threadlike structure that combines with others to form animal or vegetable tissue
   2. the tissue so formed muscle fiber
2. a slender, threadlike structure made from a mineral or synthetically rayon fibers
3. 1. any substance that can be separated into threads or threadlike structures for spinning, weaving, etc. cotton fiber
   2. any such thread or structure wool fibers
4. a threadlike root
5. the texture of something a fabric of coarse fiber
6. character or nature; quality a man of strong moral fiber
7. roughage

Etymology: Fr fibre < L fibra, akin to filum, thread: see file