VISUAL • FREE TRANSLATOR.ORG • Definition of Visual

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/vˈɪʒəwəl/ Listen

adjective

Visual adj.

1.

Of or pertaining to sight; used in sight; serving as the instrument of seeing; as, the visual nerve. "The air, Nowhere so clear, sharpened his visual ray."

2.

That can be seen; visible. (R.)

Visual angle. (Opt.) See under Angle.

Visual cone (Persp.), a cone whose vertex is at the point of sight, or the eye.

Visual plane, any plane passing through the point of sight.

Visual point, the point at which the visual rays unite; the position of the eye.

Visual purple (Physiol.), a photochemical substance, of a purplish red color, contained in the retina of human eyes and in the eyes of most animals. It is quickly bleached by light, passing through the colors, red, orange, and yellow, and then disappearing. Also called rhodopsin, and vision purple. See Optography.

Visual ray, a line from the eye, or point of sight.

Visual white (Physiol.), the final product in the action of light on visual purple. It is reconverted into visual purple by the regenerating action of the choroidal epithelium.

Visual yellow (Physiol.), a product intermediate between visual purple and visual white, formed in the photochemical action of light on visual purple.

See images of 'Visual'

Etymology of 'Visual'

Collaborative International Dictionary of English 0.48

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"Visual" Quotes from Famous Books

... will supply a number of instances of the habitual deceptions of sight and touch and hearing. I came upon these things in my reading, in the laboratory, with microscope or telescope, lived with them as constant difficulties. I will only instance one trifling case of visual deception in order to lead to my next question. One draws ...

— First and Last Things • H. G. Wells

... about to appear very inconsistent. In the previous sections I have said that all figures in Flatland present the appearance of a straight line; and it was added or implied, that it is consequently impossible to distinguish by the visual organ between individuals of different classes: yet now I am about to explain to my Spaceland critics how we are able to recognize one another ...

— Flatland • Edwin A. Abbott

... Lodge—the name was the choice of a former tenant—the work of the day had begun in real earnest. Instinctively slackening his pace, he went by the house with his eyes fastened on the hedge opposite, being so intent on what might, perhaps, be described as a visual alibi for Bassett's benefit, in case the lad still happened to be there, that he almost failed to notice that Hartley was busy in his front garden and that Joan was standing by him. He stopped short ...

— Salthaven • W. W. Jacobs

... indeed that the two stepped aboard without use of a plank. The position of the moon in the sky was such that the shadow of the trees was cast several feet beyond the boat, which, as a consequence, was wrapped in obscurity. Peering here and there, the youths began a visual search for the evidence they did not wish to find. Alvin tried the covering, which had been drawn over the cockpit, preliminary to taking the bunch of keys from his ...

— The Launch Boys' Adventures in Northern Waters • Edward S. Ellis

... by the mind in the wire itself, as concurrent with the visual changes taking place in the eye. But what connects the wire with this organ By what means does it send such intelligence of its varying condition to the optic nerve? Heat being as defined by Locke, 'a very brisk agitation of the insensible ...

— Fragments of science, V. 1-2 • John Tyndall

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