(redirected from Grids)
Also found in: Dictionary, Thesaurus, Medical, Acronyms, Idioms.


see electron tubeelectron tube,
device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at low pressure (in a gas tube).
..... Click the link for more information.


A framework of parallel, crisscrossed lines or bars forming a pattern of uniform size; sets of intersecting members on a square or triangular matrix, which make up a three-dimensional structural system.

power grid

A network of power transmission and distribution facilities used to provide electricity to users such as homes, businesses, and industry. Large power plants, wind-power-generating facilities, and small power producers such as photovoltaic farms feed electrical power into the grid for distribution to users.


(computer science)
In optical character recognition, a system of two groups of parallel lines, perpendicular to each other, used to measure or specify character images.
(design engineering)
A network of equally spaced lines forming squares, used for determining permissible locations of holes on a printed circuit board or a chassis.
A metal plate with holes or ridges, used in a storage cell or battery as a conductor and a support for the active material.
Any systematic network, such as of telephone lines or power lines.
An electrode located between the cathode and anode of an electron tube, which has one or more openings through which electrons or ions can pass, and serves to control the flow of electrons from cathode to anode.
A system of uniformly spaced perpendicular lines and horizontal lines running north and south, and east and west on a map, chart, or aerial photograph; used in locating points.
(mining engineering)
Imaginary line used to divide the surface of an area when following a checkerboard placement of boreholes.


1. See gridiron.
2. See grillage.
3. In surveying, closely-spaced reference lines which are perpendicular to each other; elevations usually are taken at the intersections of these lines.


A GEOREFF grid. This is superimposed on map.
i. The system of two sets of parallel lines uniformly spaced and crossing at 90° to each other to form a pattern of squares. This grid is designed so that any point on the map can be designated by its latitude and longitude or by its grid coordinates, and a reference in one system can be converted into a reference in another system. Such grids are usually identified by the name of the particular projection for which they are designated. See universal transverse Mercator's grid.
ii. The electrodes in an electron tube between the cathode and the anode that permit and direct the passage of electrons or ions.
iii. Two sets of mutually perpendicular lines dividing a map or chart into squares or rectangles to permit the location of any point by a system of rectangular coordinates as in a military grid, world geographic reference system, or GEOREFF. See GEOREFF.
iv. Pertaining to or measured from a reference grid, such as a grid azimuth, grid latitude, or grid meridian.


1. a network of horizontal and vertical lines superimposed over a map, building plan, etc., for locating points
2. the grid the national network of transmission lines, pipes, etc., by which electricity, gas, or water is distributed
3. Electronics
a. 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
5. a plate in an accumulator that carries the active substance


(1) Any interconnected set of nodes such as the electric power network or a communications network.

(2) "The Grid" is a nickname for Internet2. See Internet2.

(3) In a vacuum tube or gas-filled electron tube, the grid is a perforated electrode through which electrons may pass. The term typically refers to the control grid in a triode, tetrode or pentode vacuum tube. In these cases, the grid is used to control the amount of current flow between the cathode and plate (anode). As the voltage potential is varied on the control grid, the amount of current allowed to pass through also varies. Relatively small fluctuations in the grid's potential can control substantially larger amounts of current flow through the tube. This phenomenon is referred to as "gain." Tetrodes and pentodes use additional grids to regulate current flow and effect gain. See screen grid and suppressor grid.
References in periodicals archive ?
Section 4, including Chapters 13, 14, and 15 (Application Integration, Grid-Enabling Network Services, Managing Grid Environments), defines the integration services, from applications to networks.
As workloads change dynamically throughout the grid, so must storage.
Hamiltonian paths and cycles also exist for tetrahedral grids under similar conditions.
TACC and United Devices will train the UT IT staff to install and manage the United Devices software and will also train UT researchers to develop applications that run on the UT grid.
AVAKI Corporation offers the first commercial grid software solution to provide highly secure, wide-area access to processing, data and application resources in a single, uniform operating environment.
For more information about IBM Grid Computing, visit http://www.
Global smart grid market forecasts and analysis for 2012-2022.
Big Blue officials indicated that the company's Grid offerings will focus on five areas: research and development, engineering and design, business analytics, enterprise optimization, and government development.
Vendors and investors seek other names for their company and products, while enterprise IT early-adopters continue to create grid computing-related job titles and responsibilities," said William Fellows, Principal Analyst and one of the lead authors of this report.
Forecasts and analysis for the 2 super grids submarkets from 2012-2022.
While Sun and Voltaire have collaborated for quite some time to deliver high performance clusters and grids to customers worldwide, we are very pleased to take the next step by announcing the global agreement," said Mark Favreau, president and head of worldwide sales for Voltaire.
How Sensing and Monitoring Alleviates 21st Century Grid Management Challenges