1) Fiber 2) Fibre 
having thread-like fibers or scales
• (a.) Covered with hairlike appendages, as the under surface of some lichens; also, composed of little strings or fibers; as, fibrillose appendages.
Having small fibers.
Fi·bril'lose adjective Covered with hairlike appendages, as the under surface of some lichens; also, composed of little strings or fibers; as, fibrillose appendages. 
With fine fibers or threads.
having thread-like fibers or scales
[adj] - covered with fibrils more or less evenly disposed
fibrillose 1. Covered with fibrils more or less evenly disposed. 2. Furnished or abounding with fine fibers.
adjective covered with fibrils more or less evenly disposed