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 ?
NOW I know during his playing days former Wrexham and Tranmere Rovers midfielder Seamus Heath may have gone to ground a tad easy, but during a recent trip to LA he took his diving to new heights.
NOW that we have got the nasty elections out of the way and the victors have gone to ground once more, I would just like to remind the council that the shops in Speke parade are still standing - despite the council giving assurance (in the ECHO) that work would start early spring.
Purse said: ``The referee has made his decision and I don't think it was a penalty but I've gone to ground in the box and it probably made it easier for him (Defoe) to go down.
He twice rang police while pursuing the thief and told them exactly where he had gone to ground in a block of flats.
If Daithi had gone to ground at the time when Andy Moran pulled him back, Andy Moran would have probably got a black card but within the rules it wasn't a black card.
Yet Dyer could have gone to ground as the keeper wrestled with him.