"a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding"@en-us . . "flood plain"@en-us . "0"^^ . . "floodplain"^^ . . "a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding"@en-us . "floodplain"@en-us . . . "108703329"@en-us . "0"^^ . . "109281914"^^ . . . "09281914-n"^^ . . . .