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 ?
From the above it is quite clear that the chapter titles are fully descriptive and they cover ground that is of common interest to those involved in manufacturing food that is of good quality, and is safe to store and consume.
The scope of the framework agreement will cover ground source heat pumps up to 14kW and over 14kW.
Allotments cover ground on our left side before we reach Church Road.
PLANTS FOR QUICK GROUND COVER Ground cover will help keep weeds at bay.
A spokesman said: "It is important to stress that a shotgun will probably be ineffective against the cat, which can cover ground very quickly."
The Well House is prominent on our right and the former Wesleyan Chapel (1862) and then School House cover ground on the right hand side.
Remove turf, cover ground with black polythene and gravel to prevent weeds growing.
- Protective cover ground with Wollfilzpappe, check the surface, roughen old coating, remove impurities on interior walls and ceilings;