'Battlements' in the Bible

and I will make thy battlements of rubies, and thy gates of carbuncles, and all thy borders of precious stones.

Go up upon her walls, and destroy; but make not a full end; take away her battlements, for they are not Jehovah's.

a day of the trumpet and alarm, against the fenced cities and against the high battlements.

I have cut off nations: their battlements are desolate; I made their streets waste, that none passeth by; their cities are destroyed, so that there is no man, so that there is no inhabitant.