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:

In the lumber trade, a general term for wood of many species of oak belonging to a subgroup of oak trees, including Q. alba and others, all characterized by having acorns that mature in six months, are sweet or slightly bitter, and have a hairless inside shell. Trees are native to Europe, Asia, north Africa, and North America.