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 ?
Most are 12 to 14 feet off the ground, with ramps of more than 140 feet to ease entry.
will be getting funding to get this initiative off the ground.
Since the definition of running requires periodically getting both feet off the ground at the same time, Sony has had to develop a new "running motion" technology.
The idea went through many iterations while never getting off the ground.
The Vatican is preparing a point-by-point refutation of the new film, which will be distributed worldwide before the film gets off the ground.
In our pursuit of dancing off the ground, we had to reckon not only with gravity, safety, strength, rigging, and courage, but also with the fatigue and nausea of altitude sickness that can accompany the 5,000-foot-elevation of Boulder, Colorado.
There is a lot of goodwill from other agencies who want this project to get off the ground.
If the hammocks are rigged too high off the ground, a child will have difficulty climbing into the hammock and may become trapped or entangled.
So it seems she's struggling to get the TV show and the album off the ground.
Tourism chiefs are hoping it will be second time lucky for the pounds 500,000 Hotel Monument, built 150ft off the ground at the top of Grey's Monument.
Raise the forks a foot off the ground and put jack stands under them.