ground

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ground

 [grownd]
1. a path of conduction from an electrical circuit to the earth.
2. to connect an electrical circuit or electrical equipment to the earth.
3. zero electrical potential.

ground

Etymology: AS, grund
1 (in electricity) a connection between the electric circuit and the ground, which becomes a part of the circuit.
2 (in psychology) the background of a visual field that can enhance or inhibit the ability of a patient to focus on an object.

ground

1. Basic substance or foundation.
2. Reduced to a powder; pulverized.
3. In electronics, the negative or earth pole that has zero electrical potential.

figure

A part or pattern in the visual field which has the perceptual attribute of completeness and is perceived as distinct from the rest of the field which forms the ground. Example: a printed word against a background page.
ambiguous figure An image or drawing arranged in such a way that its perception oscillates or flips involuntarily between, usually, two interpretations even though the retinal image remains constant, thus indicating that higher cortical processing are involved. Syn. reversible figure. See Blivet figure; Kanizsa figure; illusion; Necker cube; Rubin's vase; Schroeder's staircase.
Blivet figure An 'impossible' figure in which three apparently solid tubes are attached at one end of a rectangular base which projects only two bars (Fig. F4). See Necker cube; Schroeder's staircase; Rubin's vase.
fortification figure See scintillating scotoma.
Kanizsa figure An ambiguous figure in which the illusory contour of a square (or triangle) appears in the middle of four (or three) truncated solid squares (or circles). It is an illustration of the perceptual ability to make sense of an incomplete figure by creating a 'whole' image from the separate elements (Gestalt organization). Some people cannot perceive the contour. Syn. Kanizsa square (Fig. F5).reversible f. See ambiguous figure.
Fig. F4 Blivet figureenlarge picture
Fig. F4 Blivet figure
Fig. F5 Kanisza figureenlarge picture
Fig. F5 Kanisza figure
References in periodicals archive ?
It is easier to cover ground in a squad car and more effective reduction in crime figures is achieved by high technology campaigns against major villains.
Wallace and his crew mainly fish four Shimano 130 outfits, trolling artificial lures to cover ground.
Officers on bicycles can quickly cover ground that patrol cars can't, especially in parkland on the waggonways and around our busier estates.
Few complained when Gravesen's name was announced before the game, but the Dane laboured in midfield, struggled to cover ground and was outfought and out-played.
Kjerfve says that he's less convinced that casuarina trees can act as a physical barrier against the sea because they cover ground less densely and are more easily uprooted.
The agreement would cover ground handling services at Copenhagen Airport in Denmark, Gardermoen in Norway and Arlanda in Sweden.
THERE are few plants as versatile as ivy - it will climb, trail, and cover ground like no other and can even be moulded into topiary shapes given the right framework or support.
Scotland do possess a strong pack who acquitted themselves well against France last time out, but their back three especially are too slow, and that can present huge problems when they have to cover ground and defend.
dollars and cover ground transportation, including airport transfers, public transportation (on the Metro in Paris, Underground in London and on city buses in both cities), as well as rail transportation, including the Eurostar.