In fortification, a battery nearly on a level with the water.(noun)
The Century Dictionary (Public Domain)
Use "water-battery" in a sentence
"Fort Barrancas was designed by Joseph Gilbert Totten, and connected to the Spanish-built water-battery by an underground walkway tunnel."
"The narrow entrance is at the exterior angle of the L, between the water-battery and the lighthouse; and in the interior angle are the"
"Fortress -- so close that the artillerymen on the water-battery could have tossed a biscuit aboard -- and, heading north-east, passed out between the capes, where, seaward, the towering black sides of a sloop of war rose, bright work aglitter, smoke blowing fitfully from her single funnel."