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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 ?
Gone To Ground may resist the challengers to take the prize, but is expected to be pushed hard by the Javier Jarne-owned Akelawre in the red jacket.
Gone To Ground flew clear from the traps but was all out to resist the powerful late run of Liam Dowling's Akelawre in 28.38sec.
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.
Gone to ground: England's Nasser Hussain drops a catch in the slips, much to the disgust of Mark Butcher, against Australia during the first day's play of the First Test at The Gabba in Brisbane.
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."
Catterick: 2.15 A Bit Of Fun, 2.45 Gone To Ground, 4.45 American Cousin, 5.15 Sharoura.