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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Medical Dictionary, © 2009 Farlex and Partners

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
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Herbalife Ltd (NYSE:HLF), a supplier of weight-management, nutrition and personal care products, revealed on Tuesday that it has broken ground on construction of a new 80,000 sq ft extraction facility in Changsha, Hunan Province, China.
The State University of New York Downstate Medical Center has broken ground for a new $3 million building at 670 Parkside Avenue, Brooklyn, to house its Infant and Child Learning Center.
Metro Homes has broken ground for Liberty Point, a new condominium community rising at the corner of Warren and Morris Streets in the historic Paulus Hook section of Jersey City.
452 Old Hook Road Associates LLC has announced it has broken ground on a new, three-story, 25,000-SF medical office building at 452 Old Hook Road in Emerson.
York Hunter has broken ground on the new Greenwich Street apartments, a $14 million loft condominium project in Greenwich Village featuring a large, architecturally detailed glass curtain wall facade.
Following the success of 600 Alexander Park, Trammell Crow Company has broken ground on a second speculative office project in the Princeton (West Windsor Township) market.
Davis & Partners has broken ground for a high-rise apartment development in an Upper East Side neighborhood that has lately been a hotbed for new luxury housing.
Harry Macklowe has also broken ground on his site at 777 Sixth.