ravelin

/rav-lin/US // ˈræv lɪn //UK // (ˈrævlɪn) //

饶舌的人,饶舌音,饶舌,饶舌者

Definitions

n.名词 noun

1
Fortification.
- : a V-shaped outwork outside the main ditch and covering the works between two bastions.

Ravelin, rav′lin, n. a detached work with two embankments raised before the counterscarp.
On going a little further, we came opposite to the ravelin, which had been my chief annoyance during my last days' piquet.
This had the further advantage of giving great saliency to the ravelin for cross-fire over the terrain of the attack.
The ravelin is here introduced, and made so large that its faces are in prolongation of those of the bastions.
The caponier is the vital point of the front, and is protected in important works by a ravelin and keep.