'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 spoken every precept to all the people according to the law, he took the blood of calves and of goats, with water, and scarlet wool, and hyssop, and sprinkled both the book, and all the people,

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