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| a fool or simpleton; ninny. |
| a gadget; dingus; thingumbob. |
| grid (ɡrɪd) | |
| —n | |
| 1. | See gridiron |
| 2. | a network of horizontal and vertical lines superimposed over a map, building plan, etc, for locating points |
| 3. | a grating consisting of parallel bars |
| 4. | the grid the national network of transmission lines, pipes, etc, by which electricity, gas, or water is distributed |
| 5. | (NZ) short for national grid |
| 6. | electronics Also called: control grid |
| a. screen grid See also suppressor grid an electrode situated between the cathode and anode of a valve usually consisting of a cylindrical mesh of wires, that controls the flow of electrons between cathode and anode | |
| b. (as modifier): the grid bias | |
| 7. | See starting grid |
| 8. | a plate in an accumulator that carries the active substance |
| 9. | any interconnecting system of links: the bus service formed a grid across the country |
| 10. | Northern English dialect word for face |
| [C19: back formation from | |
| 'gridded | |
| —adj | |
| GRID Global Resource Information Database |
grid
in an electron tube, an electrode that has openings for controlling the flow of electrons or ions through it. Unmodified, the term applies to a control grid that is ordinarily placed between the cathode and the anode (or plate) of an electron tube to vary the flow of current. A screen grid-usually maintained at a fixed potential-is placed between a control grid and an anode to reduce the electrostatic influence of the anode on the control grid. A suppressor grid is interposed between two positive electrodes-usually the screen grid and the anode-to reduce the flow of secondary electrons from one to the other
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