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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 ?
Peter Claver Catholic Church on Sunday broke ground for a new sanctuary.
KTC broke ground July 9 on the construction of a new 180,000-square-foot warehouse and office facility in Lodi, Calif.
Caption: Albert Einstein College of Medicine of Yeshiva University recently broke ground for a new $200 million, 201,000 s/f medical research facility, to be known as the Michael F.
PITTSBURGH & REYDARFJORDUR, Iceland -- Alcoa broke ground today on its 322,000 metric ton per year (mtpy) Fjardaal aluminum smelter in East Iceland, the company's first greenfield smelter in 20 years.
JGPCO) broke ground this past week on a new high school for Cerebral Palsy of North Jersey.
and Quincy Johnson Architects broke ground with gold shovels in hand on Wednesday, June 23rd at 10 a.
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.
To alleviate customer inconvenience, before we broke ground on the casino, Perini built three new parking lots so guests can bypass the construction area.
New Jersey Schools Construction Corporation broke ground on Elizabeth School #29 on July 29, 2004--the second anniversary of Governor James E.