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Opacity   /oʊpˈæsəti/   Listen
Opacity

noun
1.
The phenomenon of not permitting the passage of electromagnetic radiation.
2.
Incomprehensibility resulting from obscurity of meaning.  Synonym: opaqueness.
3.
The quality of being opaque to a degree; the degree to which something reduces the passage of light.  Synonym: opaqueness.



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"Opacity" Quotes from Famous Books



... classification will help us here. We have certain qualities in common with inanimate matter, such as weight, opacity, resilience. It is clear that these are not human. We have other qualities in common with all forms of life; cellular construction, for instance, the reproduction of cells and the need of nutrition. These again are not human. We have others, many others, ...
— The Forerunner, Volume 1 (1909-1910) • Charlotte Perkins Gilman

... The opacity was now entirely removed, and the facets cut upon the wine-glass Miselle had principally watched in its progress shone with the clear and polished brilliancy characteristic of the ...
— The Atlantic Monthly, Volume 14, No. 83, September, 1864 • Various

... in the temperament and in the transmuting and modifying medium. More or less of filtration does it all. Nature makes the poet, not by adding to, but by taking from; she takes all blur and opacity out of him; condenses, intensifies; lifts his nerves nearer the surface, sharpens his senses, and brings his whole organization to an edge. Sufficient filtration would convert charcoal into diamonds; and we shall everywhere find that the purest, most precious ...
— Atlantic Monthly Volume 6, No. 37, November, 1860 • Various

... early morning hours, had gone out to procure some from the stack. While he was returning to the entrance, the wind rolled him over a few times, causing him to lose his bearings. It was blowing a hurricane, the temperature was -70 F., and the drift-snow was so thick as to be wall-like in opacity. He abandoned his load of coal, and, after searching about fruitlessly for some time in the darkness, he decided to wait for dawn. Hurley found him about twenty yards from the ...
— The Home of the Blizzard • Douglas Mawson

... chamber of the eye at the menstrual period, which became absorbed during the intervals of menstruation. Blair relates the history of a case of vicarious menstruation attended with conjunctivitis and opacity of the cornea. Law speaks of a plethoric woman of thirty who bled freely from ...
— Anomalies and Curiosities of Medicine • George M. Gould

... The opacity of the rings is proved by the shadow which they cast upon the ball of the planet. This is particularly manifest at the time when they are edgewise to the earth, for the sun being situated slightly above or below the plane of the rings ...
— Other Worlds - Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries • Garrett P. Serviss

... dullness and opacity of our own minds. We are slow to wake up to a sense of the divinity that hedges us about. The great office of science has been to show us this universe as much more wonderful and divine than we have been wont to believe; shot ...
— Time and Change • John Burroughs

... retain whatever mechanical form is given to them; their parts are separated with difficulty, and cannot readily be made to unite after separation. They may be either elastic or non-elastic, and differ in hardness, in colour, in opacity, in density, in weight, and, if crystalline, in ...
— The World's Greatest Books - Volume 15 - Science • Various

... from the bowels of the earth, being sometimes found pure, but mostly combined with other matter. They are distinguished by their weight, tenacity, hardness, opacity, color, and peculiar lustre, known as the metallic lustre; they are fusible by heat, and good conductors of heat and electricity; many of them are malleable, and some extremely ductile. Those which were first known are gold, silver, iron, ...
— A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery • Benziger Brothers

... notion of help or hinderance I should not find it easy to say, but before I reached the water's edge—in fact I never did reach it, and had some difficulty making my way back to the house,—I heard the rapid throb of the oars in the row-locks as he pulled through the white opacity. ...
— Questionable Shapes • William Dean Howells

... drapery: it gives the form, but not the stuff. It is the exact reverse with marble. Granulated like a living fibre, yet susceptible of a delicate polish, it can imitate the actual substance of human flesh, with its alternations of opacity and luminousness; it can reproduce, beneath the varied strokes of the chisel, the grain, running now one way, now another, which is given to the porous skin by the close-packed bone and muscle below. Moreover, it is so docile, so soft, yet so resistant, that the iron can ...
— Renaissance Fancies and Studies - Being a Sequel to Euphorion • Violet Paget (AKA Vernon Lee)

... white blotting-paper. All such cases should be very speedily referred to a physician, and the use of needles or other instruments should not be attempted by a layman, lest permanent damage be done to the cornea and opacity result. Such procedures are, of course, appropriate for an oculist, but when it is impossible to secure medical aid for days it can be attempted without much fear, if done carefully, as more harm will result if the offending body is left in place. ...
— The Home Medical Library, Volume I (of VI) • Various

... Cold-slaw Collective opacity Felt that this was my misfortune more than my fault Found life was not all poetry He had no time to make money Intellectual poseurs NYC, a city where money counts for more and goes for less One could be ...
— Widger's Quotations from the Works of William Dean Howells • David Widger

... of milk be examined with a microscope, it will be seen as a clear liquid, holding in suspension a large number of minute globules, which give the milk its opacity or white color. These microscopic globules are composed of fatty matter, each surrounded by an envelope of casein, the principal nitrogenous element found in milk. They are lighter than the surrounding liquid, and when the milk remains at rest, they gradually rise to the top and form cream. Casein, ...
— Science in the Kitchen. • Mrs. E. E. Kellogg

... pebbles are dispersed is taken up by the rivers, fed into continual strength by the Alpine snow, so that, however pure their waters may be when they issue from the lakes at the foot of the great chain, they become of the color and opacity of clay before they reach the Adriatic; the sediment which they bear is at once thrown down as they enter the sea, forming a vast belt of low land along the eastern coast of Italy. The powerful ...
— The Stones of Venice, Volume II (of 3) • John Ruskin

... stationary; and the operations of each would be continual. In the torrid region, nothing but evaporation and heat would take place; no cloud could be formed, because in changing the transparency of the atmosphere to opacity it would be heated immediately by the operation of light, and thus the condensed water would be again evaporated. But this power of the sun would have a termination; and it is these that would begin the region of temperate heat and ...
— A History of Science, Volume 3(of 5) • Henry Smith Williams

... bubbles; and the whole plant, instead of rising to the surface of the water as hitherto, hung limp from the fissure where it was placed, and trailed upon the sand. Coincidently, (was it consequently?) a greenish tinge pervaded the water, speedily increasing in depth and opacity. In five days, no object could be discerned six inches from the glass, and my beautiful Aquarium was transformed to an ...
— Atlantic Monthly, Vol. 1, No. 4, February, 1858 • Various

... universal. All the others are partial and limited. All the others, even the newly discovered cathode rays, are subject to obstruction by certain forms of matter; that is, to them certain forms of matter are opaque. But gravitation knows no opacity in the universe. No atom of matter is exempt from its sway. It streams through all obstructive media as though such media did not exist. It would appear that heat, light, electricity, sound, the cathode rays, and all other ...
— Notable Events of the Nineteenth Century - Great Deeds of Men and Nations and the Progress of the World • Various



Words linked to "Opacity" :   softness, quality, opaque, muddiness, indistinctness, radiopacity, blurriness, physical phenomenon, murkiness, transparency, cloudiness, fuzziness, incomprehensibility, clarity, fogginess



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