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 ?
The holding ground at Sandown for the Classic trial scuppered early plans and then a bruised heel put him out of the Newmarket Stakes.
Ian Balding has not ruled Grey Shot out of the Champion, despite the classy Flat stayer grinding to a halt in the holding ground.
The beauty of it being so wet is that it will not impede too many, like holding ground would.
Jumping well, her mount made every yard of the running and stayed on strongly in the holding ground to beat Offcoursehekhan by four lengths.
Jimmy Fortune cut out much of the running on the holding ground on John Gosden's Percussionist with Darryll Holland tracking on Franklins Gardens.
The Aido McGuinness-trained eight-year-old, who has also won four times on the Flat and three times over fences, is on a recovery mission having been pulled up on his most recent start at Galway on Wednesday, when he failed to handle the holding ground.
Balisteros was never travelling in the holding ground when only third at Tranwell on Easter Monday.
Factor in the hill and the holding ground and he is hard to fancy.
He has done wonderfully well under that weight on this holding ground," he said.