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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 ?
Exports and imports gained ground in October, easing some concerns that exports remain weak amid the global slowdown and imports fall due to sluggish domestic demand.
Polish presidential candidate Jaroslaw Kaczynski has gained ground over his opponent during the last debate before this weekend's runoff election, an online opinion poll said Thursday, according to dpa.
However, the victory means they have gained ground on fellow promotion chasers Blackpool, who were beaten at Port Vale and also Plymouth, who were defeated at Chesterfield.
The embattled Euro gained ground also, rising 0.40 percent to USD 1.3448
Tranmere gained ground on Wigan, who drew at Peterborough, Crewe and Bristol City, who lost to QPR.
Tokyo stocks gained ground Monday morning, with the Nikkei index hitting its highest level since April 2010, as a string of strong U.S.
In the first division secondplaced Halewood Athletic gained ground on leaders Travellers Rest by winning their head-to-head 4-0, Bohanna grabbing a hat-trick with Murray also on target.
In New York trading on Monday, the dollar generally moved little against the yen, but temporarily gained ground from an improvement in a U.S.
Stocks gained ground in early Tokyo trading Friday, buoyed by a rise in U.S.
Stocks gained ground in early Tokyo trading Wednesday, with investors keeping close tabs on Japan Airlines in its return to the market.