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 ?
But every time he forced Wyatt to give ground on unsteady legs, the Torquay slugger would summon the energy to hurl over a hook that would briefly stop him in his tracks before he resumed his two-fisted attacks.
Receivers: The Stop receiver pushes straight upfield, forcing the DB to give ground.
In other regions, however, there are indications that FERC may be willing to give ground on its bid to create four super-regional RTOs in the Midwest, Northeast, South, and West.
He does jump right and he does give ground away, but when they are going faster he jumps straighter.
His hard line emerged as rumours swept Brussels that the PM was willing to give ground on the pounds 3billion deal.
They delighted us with their quadruple bypass strategy on the Belmont Learning Center - hunker down, don't give ground, deny and lie, and finally, pretend you've changed until everyone's forgotten.
ALEPH's eHail Network combines dispatch software with Nextel's Internet-ready phones to give ground transportation companies the ability to fill non-revenue time instantly and reduce the need for labor-intensive, voice-driven call centers and dispatch operations.
But he warned that the Lib Dems would not give ground on the issue of local government voting reform.
The Government was equally determined not to give ground, warning peers that their action could "kill" legislation essential to secure extra funding for higher education.
Council members need to give ground if they are to learn to deal with one another, he said.
GTN will give ground transportation providers a no-strings attached, 30-day free trial.
No one wanted to give ground - whether they were 5ft 2in or 6ft 3in.