fascicle
From ZooTerms (Dictionary of Invertebrate Zoology)
fascicle also fasciculus (noun; plural fasciculi, fascicles; Latin diminutive fascia, bundle): 1. A small bundle or tuft.
2. A bundle of nerve or muscle fibers.
3. (Annelida) A bundle of setae originating from a common muscular source, normally two dorsolateral and two ventrolateral fasciculi per segment.
4. (Arthropoda) A stylet bundle or combination of mouthparts of blood-feeding arthropods that function to pierce the skin.
5. (Cnidaria) Tubes intergrown together to form a stem or branches.
6. (Mollusca: Polyplacophora) A bundle of hairs or bristles against each valve end.
7. (Porifera) Fibers intertwined in bundles to produce complex interlocking tracts.
