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 ?
Again on safety grounds, the political agreement provides that member states can also in certain cases require an even higher level of linguistic proficiency (level 5 on the ICAO scale).
It has been postponed on health and safety grounds and is expected to be played next Saturday.
It is likely that authorities today would take a dim view of this on health and safety grounds Left: Attending Sunday School at the parish Church, 1911.
Initially the match was expected to kick off at 4pm, but with the Pools team bus going nowhere, a decision was made on safety grounds.
Organisers of the Glass Butter Beach festival in Llanbedrog pulled the plug on the two day event on health and safety grounds.
Akbar Al Baker, CEO of Qatar Airways, said, Libya is an important market for us and it was unfortunate that unfolding events there had affected operations on safety grounds of all airlines flying to the country.
It's about time that Travel Coventry actively considered its customers and what the undesired consequences are of the ill thought out imposition of new rules on safety grounds that actually make travelling by bus more and not less dangerous, as well as delaying the bus for all other passengers on board.
Ancelotti will not have been complaining about the decision, forced on Chelsea by the local authority and police on safety grounds, even if the Stamford authority and police on safety grounds, even if the Stamford Bridge pitch was playable.
The current shelves have been in place for more than 25 years and are showing signs of deterioration, so they are being replaced on health and safety grounds.
The Plough Lane track's groundstaff team - assisted by members of the racing office - had been working on the track since early morning, and it was "perfectly raceable", according to general manager Keith Hallinan, when the decision to abandon on health and safety grounds was taken.
STAFF at a newsagent have been banned from giving customers' dogs biscuits - on health and safety grounds.