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Visual   /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.






Collaborative International Dictionary of English 0.48








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"Visual" Quotes from Famous Books



... other methods of eclipses and fixed stars be sought, not taking into account, as we have said, that these are causes for great delay; for the consideration of such eclipses, and the movement of the moon, and its visual conjunction with any fixed star, and all other like mathematical considerations can at present be of no advantage to us, because of our being limited to such a brief period as two months, in examining and determining ...
— The Philippine Islands, 1493-1803 • Emma Helen Blair

... imagination, the sight operates the same introtraction (pardon the coinage) upon itself. It ebbs inwards, so to speak, from all the contents that were given in what may be called its primary sphere. It represents itself, in its organ, as a minute visual sensation, out of, and beyond which, are left lying the great range of all its other sensations. By imagining the sight as a sensation of colour, we diminish it to a speck within the sphere of its own sensations; ...
— Blackwood's Edinburgh Magazine, Volume 54, No. 337, November, 1843 • Various

... curiosity but the gate was too far away for him to do more than catch a word now and then. It was also out of Sarah Jane's visual line, so she knew nothing of the ...
— Miss Minerva and William Green Hill • Frances Boyd Calhoun

... see where several streams entered the body of water, coming from opposite points of the compass, and thus confirming at least one portion of his explained theory; but, so far as his visual powers went, there was no other considerable body of ...
— The Lost City • Joseph E. Badger, Jr.

... the horizon which occupied the visual rays and thoughts of the doctor, being opposite to the west, was illuminated by the transcendent reflection of twilight, as if it were day. This arc, limited in extent, and surrounded by streaks of grayish vapour, was uniformly blue, but of a leaden rather than cerulean blue. The doctor, ...
— The Man Who Laughs • Victor Hugo


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