'Wool' in the Bible

Now the place in the book where he was reading was this: He was taken, like a sheep, to be put to death; and as a lamb is quiet when its wool is being cut, so he made no sound:

For when Moses had given all the rules of the law to the people, he took the blood of goats and young oxen, with water and red wool and hyssop, and put it on the book itself and on all the people,

And his head and his hair were white like wool, as white as snow; and his eyes were as a flame of fire;