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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 ?
Breaking Ground has constructed more than 3,200 units of supportive housing across 11 New York City sites and four in upstate New York and Connecticut, including Breaking Ground's flagship Times Square residence, the largest permanent supportive housing site in the nation.
And, while other developer's shovels are now idle, the company is breaking ground or cutting the ribbon on three different new low-and moderate-income residential developments all built in partnership with neighborhood associations.
It is so gratifying to be breaking ground on such an important project," said Deborah Saweuyer-Parks, president and CEO of Homestead Capital, one of the partners.
LOS ANGELES -- Moderate-income wage earners in Los Angeles will have the first opportunity to buy 165 new condominiums breaking ground today near the Avenue 26 Gold Line Station in the Lincoln Heights neighborhood.
Coming off a successful 1,400-megawatt scrubber installation in Washington State, we are confident that our consortium has the capabilities and the proven processes to execute seamlessly on this project and we are pleased to be breaking ground on the Marshall Station.