Fibers are like tiny little rods or tubes-much longer than they are wide. Just about any fiber that you can think of is a polymer. (I guess that if it's a metal, it's called a wire, not a fiber!). Fibers can be natural-from plant or animals, or synthetic-made by people.
Accessory uses and structures. (A) A structure or use which is clearly incidental to a principal structure or use, and is located on the same lot with the principal structure or use, is an accessory use. All accessory uses are subject to the restrictions in this section.
use is a general word referring to the application of something to a given purpose: to use a telephone. use may also imply that the thing is consumed or diminished in the process: I used all the butter. When applied to persons, use implies a selfish or sinister purpose: He used his friend to advance himself.