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

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. At six yards, he plants his outside foot and snaps his head toward the QB, expecting the ball toward the sideline.
However, her party's position on key issues provide clues as to where the Tories may have to give ground. These include:
But Mr Brown made clear today he would not give ground on the central point.
And Education Secretary Ruth Kelly gave her strongest indication so far that she could give ground to her Labour critics when she praised their "constructive" work.
His hard line emerged as rumours swept Brussels that the PM was willing to give ground on the pounds 3billion deal.
He urged Britain to equip and give ground support to allies fighting IS.
But he warned that the Lib Dems would not give ground on the issue of local government voting reform.
"He does jump right and he does give ground away, but when they are going faster he jumps straighter.
MANCHESTER United chief executive Peter Kenyon says both the players' union and the Premier League must give ground to avert a strike.
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.
"No one wanted to give ground - whether they were 5ft 2in or 6ft 3in.