Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by form]
6. [materials by physical form]
7. [fiber and fiber by product]
8. fiber
9. synthetic fiber

Anotations

Scope note:

Very thin, flexible glass or plastic filament along which large quantities of textual data and images can be transmitted in the form of light pulses; for the branch of optics dealing with the transmission of light through optical fiber, use "fiber optics."