ground

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Related to give ground: loose end, in the first place, On a par, give rise to, in line with, pat on the back, rubbing shoulders

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 ?
Marc and Betty (America Ferrera, above) compete for a place on a prestigious course for young editors, but only one position is available and neither wants to give ground.
Mr Brown has already been forced to give ground and accept that evidence sessions will be held in public, having originally announced that they would be conducted behind closed doors.
The row has again put Mr Brown under pressure from Labour MPs who forced him this month to give ground over the abolition of the 10p rate of income tax.
They stood in front of each other and unloaded heavy shots and neither was willing to give ground in a ferocious battle of wills.
But he was not expected to give ground over the principle of an increased role for private firms in areas such as the NHS.
This is trench warfare of the NBA playoffs, only somebody has to give ground every round.
Swing: Check LB, then give ground immediately (2 yards) running a slightly bowed course - use speed on first 5 steps, then come under control, turning your numbers to the QB - be ready to adjust to the ball.
Forward pressure saw Caerphilly give ground and Scott Eggar, playing his first game of the season at No.
But Mr Brown made clear today he would not give ground on the central point.
HEALTH Secretary Alan Johnson last week refused to give ground over calls for a cancer patient on Teesside to be allowed to pay for top-up drugs without having her NHS treatment stopped.
But Home Secretary Charles Clarke last night refused to give ground on the plan.
HOME Secretary Charles Clarke today accused the House of Lords of ``digging in its heels'' after again refusing to give ground over the Government's controversial antiterrorism powers.