Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. animal material
8. [animal material by form or function]
9. [animal material by excretions, secretions, and fluids]

Narrower term/s

• silk (silkworm material) [NP][+]
  • tussah silk (fiber)
  • schappe silk
  • bourette silk
  • waste silk
  • dupion
• spider silk (material) [NP]

Anotations

Scope note:

Secretions and excretions of protein fiber, of various compositions, from spiders and various insects. The fiber is used by the animals for cocoons, webs, transportation, nests, to catch or preserve prey, among other purposes.