ground


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Related to ground: ground control, ground zero

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

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 classic literature ?
She stamped three times on the ground, and the earth trembled, and both the church and the monk began to shake.
The creature fell heavily on the ground, and out of its side sprang a little hare, which ran like the wind along the river bank.
The estate had formerly belonged to a gentleman of opulence and taste, who had bestowed some considerable attention to the adornment of his grounds. Having died insolvent, it had been purchased, at a bargain, by Legree, who used it, as he did everything else, merely as an implement for money-making.
Gahan of Gathol let the ship rise a few feet from the ground, then, seizing a bow rope, he dropped over the side.
Springing lightly from the ground he swarmed up the rope toward the bow of the flier.
Still, Amphimedon just took a piece of the top skin from off Telemachus's wrist, and Ctesippus managed to graze Eumaeus's shoulder above his shield; but the spear went on and fell to the ground. Then Ulysses and his men let drive into the crowd of suitors.
He saw the plane tilt and the machine rise from the ground. It was a good take-off--as good as Lieutenant Harold Percy Smith-Oldwick could make himself but he realized that it was only so by chance.
It was thought best to divide their forces and try different trapping grounds. While Dripps went in one direction, Vanderburgh, with about fifty men, proceeded in another.
But a change in the nature of the ground compelled the doctor to vary his style of locomotion.
He fell heavily to the ground, and the spear stuck in his heart, which still beat, and made the butt-end of the spear quiver till dread Mars put an end to his life.
"The wires go out from the cave and fence in a circle of level ground a hundred yards in diameter; they make twelve independent fences, ten feet apart -- that is to say, twelve circles within circles -- and their ends come into the cave again."
And all this part where we are is the little- side ground, right up to the trees; and on the other side of the trees is the big-side ground, where the great matches are played.