'Straight' in the Bible

And their feet were straight feet; and the sole of their feet was like the sole of a calf's foot: and they sparkled like the colour of burnished brass.

Their wings were joined one to another; they turned not when they went; they went every one straight forward.

And they went every one straight forward: whither the spirit was to go, they went; and they turned not when they went.

And under the firmament were their wings straight, the one toward the other: every one had two, which covered on this side, and every one had two, which covered on that side, their bodies.

And the likeness of their faces was the same faces which I saw by the river of Chebar, their appearances and themselves: they went every one straight forward.