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. plant material
8. [wood and wood by product]
9. wood (plant material)
10. [wood by composition or origin]
11. hardwood
12. oak (wood)

Anotations

Scope note:

Pale reddish brown wood of the species Quercus rubra, having sapwood that is dark, heavy, hard, strong, and coarse-grained. It cracks in drying, but is treated and used for furniture, construction, and the interior of houses.