'Teeth' in the Bible

And behold, another beast, a second, like unto a bear, and it raised up itself on one side; and it had three ribs in its mouth between its teeth; and they said thus unto it: Arise, devour much flesh.

After this I saw in the night visions, and behold, a fourth beast, dreadful and terrible, and exceeding strong; and it had great iron teeth: it devoured and broke in pieces, and stamped the rest with its feet; and it was different from all the beasts that were before it; and it had ten horns.

Then I desired to know the certainty concerning the fourth beast, which was different from them all, exceeding dreadful, whose teeth were of iron, and its nails of brass; which devoured, broke in pieces, and stamped the rest with its feet;