batardeau
noun 2
Definitions
noun
1
A cofferdam.
An experiment was tried during the day upon the dykes of the citadel, which, as before stated, are fed by means of a sluice opposite the Scheldt, and separated from those of the city by a batardeau.
2
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.
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