![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Glacis.png/640px-Glacis.png&w=640&q=50)
Glacis
Protective slope built into a fortification / From Wikipedia, the free encyclopedia
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For other uses, see Glacis (disambiguation).
A glacis (/ˈɡleɪ.sɪs/, French: [ɡlasi]) in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a temporary structure or of stone in more permanent structure. More generally, a glacis is any slope, natural or artificial, which fulfils the above requirements. The etymology of this French word suggests a slope made dangerous with ice, hence the relationship with glacier.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Glacis.png/640px-Glacis.png)
A glacis plate is the sloped front-most section of the hull of a tank or other armoured fighting vehicle.