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 ?
Naturally, if this gets off the ground there will be strict security rules.
Lawyer Search is being launched by LCC before its previously announced e-mail network with Martindale-Hubbell gets off the ground.
Let's hope it gets off the ground ratings-wise 'cos it's costing millions to make.
Both parties are bogged down by internal rows that threaten to derail any agreement before it even gets off the ground.
If this scheme gets off the ground, there could be more statues and busts in Britain of Delors than Sir Winston Churchill," said Tory MEP Graham Mather last night.
THIS virtual reality-themed fantasy barely gets off the ground floor with its lame performances and muddled plot.
Dons' chief executive Keith Wyness last night admitted a smear campaign could kill the scheme before it even gets off the ground.
This movie turns the story into a drab romantic comedy that rarely gets off the ground.
A NEW air service between Derry and Dublin gets off the ground this month.
It will be great if it gets off the ground and does bring down another government.
Fingers crossed it gets off the ground and I'll keep you informed when I get more details.