'Compass' in the Bible

For he cast two pillars of brass, of eighteen cubits high apiece: and a line of twelve cubits did compass either of them about.

And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it round about.

And in the top of the base was there a round compass of half a cubit high: and on the top of the base the ledges thereof and the borders thereof were of the same.