from The Century Dictionary and Cyclopedia
- n. Same as pine-needle wool. See pine-needle.
Sorry, no etymologies found.
The Indians wore garments made of tree-wool, and they had bows of reed and arrows of reed with iron points.
Blown tufts of tree-wool from the grove and sealed
Phoenician merchants with _butz_, which is translated "fine linen," but is perhaps rather cotton,  the "tree-wool" of Herodotus; it also supplies embroidery, and certain precious stones, which our translators have considered to be coral, emeralds, and rubies.
So saying he gave him a bundle of tree-wool he had by him, and pursued, "O
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