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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 ?
Los Angeles officials broke ground Thursday on a $27.
Dinkins, and a host of federal, city and court officials -- broke ground today for a new $300,000,000 federal courthouse at Foley Square in lower Manhattan.
Cygnus Business Media, a leading business-to-business media company, broke ground today commencing the construction of their new facility on Janesville Avenue in Fort Atkinson.
The riverfront property, owned by The Commonwealth Group, broke ground in June 2004 and is expected to be completed by mid-2005, when AAA will take occupancy.
BREAKING GROUND: The Seventh-day Adventist Media Center, which broadcasts Christian television and radio shows from a Simi Valley industrial park, broke ground Monday on a $6 million, 22,000-square-foot facility that will house two video studios, three audio studios and six post-production video studios adjacent to its current headquarters.
NASDAQ: APFC) broke ground for its $40 million sodium azide manufacturing plant in Iron County, Utah, today, Fred D.
Joined by a gathering of more than 60 employees and local officials, Commerce Bank/Harrisburg, NA, today broke ground for its new headquarters, operations and training center at the TecPort Business Center in Swatara Twp.
New Jersey Schools Construction Corporation broke ground on Elizabeth School #29 on July 29, 2004--the second anniversary of Governor James E.
After years of trying to make their vision a reality, Simi Valley school district leaders and city officials broke ground Friday on the city's 20th elementary school.
12 /PRNewswire/ -- The Timken Company (NYSE: TKR) today broke ground for its future bearing plant in Randolph County, N.
KTC broke ground July 9 on the construction of a new 180,000-square-foot warehouse and office facility in Lodi, Calif.
In addition, the city is currently constructing four new public schools, including a $50 million middle school that broke ground last September, a $63.