A system of high tension cables by which electrical power is distributed throughout a region.
An electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube.
A cooking utensil of parallel metal bars; used to grill fish or meat.
Regular tessellation of a manifold or 2-D surface that divides it into a series of contiguous cells, which can then be assigned unique identifiers and used for spatial indexing purposes; regular division of a 2D surface.