Waterwork

Webster's Dictionary of the English Language

·noun Painting executed in size or distemper, on canvas or walls, — formerly, frequently taking the place of tapestry.

II. Waterwork ·noun An hydraulic apparatus, or a system of works or fixtures, by which a supply of water is furnished for useful or ornamental purposes, including dams, sluices, pumps, aqueducts, distributing pipes, fountains, ·etc.;

— used chiefly in the plural.