‖n.; pl.Bateaux [ F. bateau, LL. batellus, fr. battus, batus, boat, which agrees with AS. bāt boat: cf. W. bad boat. See Boat, n. ] A boat; esp. a flat-bottomed, clumsy boat used on the Canadian lakes and rivers. [ Written also, but less properly, batteau. ] [ 1913 Webster ]
Bateau bridge, a floating bridge supported by bateaux. [ 1913 Webster ]