1. 
   Batardeau
   Ba`tar·deau' noun [ French] 1. A cofferdam. Brande & C. 2. (Mil.) A wall built across the ditch of a fortification, with a sluice gate to regulate the height of water in the ditch on both sides of the wall.
   Found op http://www.encyclo.co.uk/webster/B/21
   
   
2. 
   Batardeau
   • (n.) A wall built across the ditch of a fortification, with a sluice gate to regulate the height of water in the ditch on both sides of the wall. • (n.) A cofferdam.
   Found op http://thinkexist.com/dictionary/meaning/batardeau/
   
   
3. 
   Batardeau
   A batardeau is a wall built across the ditch of a fortification, with a sluice gate to regulate the height of water in the ditch on both sides of the wall.
   Found op http://www.probertencyclopaedia.com/browse/FB.HTM
   
   

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