'Wheel' in the Bible

Now as I saw the living creatures, behold, one wheel on the earth beside the living creatures, for each of the four faces of it.

The appearance of the wheels and their work was like a beryl: and the four of them had one likeness; and their appearance and their work was as it were a wheel within a wheel.

It came to pass, when he commanded the man clothed in linen, saying, Take fire from between the whirling wheels, from between the cherubim, that he went in, and stood beside a wheel.

I looked, and behold, four wheels beside the cherubim, one wheel beside one cherub, and another wheel beside another cherub; and the appearance of the wheels was like a beryl stone.

As for their appearance, the four of them had one likeness, like a wheel within a wheel.