wool

noun

1. the fine, soft, curly hair that forms the fleece of sheep and certain other animals, characterized by minute, overlapping surface scales that give it its felting property.
2. fabrics and garments of such wool.
3. yarn made of such wool.
4. any of various substances used commercially as substitutes for the wool of sheep or other animals.
5. any of certain vegetable fibers, as cotton or flax, used as wool, especially after preparation by special process (vegetable wool).
6. any finely fibrous or filamentous matter suggestive of the wool of sheep: glass wool; steel wool.
7. any coating of short, fine hairs or hairlike processes, as on a caterpillar or a plant; pubescence.
8. Informal. the human hair, especially when short, thick, and crisp.