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Concavity   Listen

(pl. concavities)
A shape that curves or bends inward.  Synonyms: concave shape, incurvation, incurvature.
The property possessed by a concave shape.  Synonym: concaveness.

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"Concavity" Quotes from Famous Books

... space does not (properly speaking) exist; and in this position, the axillary vessels and nerves make a general curve from the clavicle at the point K, Plate 14, to the inner side of the arm, the concavity of the curve being turned towards the thoracic side. But when the arm is abducted from the side, and elevated, the vessels which are destined to supply the limb follow it, and in this position they take, in reality, a serpentine course; the first curve of which is ...
— Surgical Anatomy • Joseph Maclise

... divisions and then lashing them to the framework. The first set is placed with the concave sides up, and runs from the ridge pole to a point a few inches below the framework, so as to overhang it somewhat. A second series of halved bamboos is laid convex side up, the edges resting in the concavity of those below, thus making an arrangement similar to ...
— The Tinguian - Social, Religious, and Economic Life of a Philippine Tribe • Fay-Cooper Cole

... notably different thickness would have been found there;"—though it does not appear why they were not thus calipered.[247] Further, externally, "all the sides" (says Professor Smyth) "were slightly hollow, excepting the east side;" and the "two external ends" also show some "concavity" in form. "The outside," (he avows) "of the vessel was found to be by no means so perfectly accurate as many would have expected, for the length was greater on one side than the other, and different also according to the height at which the measure ...
— Archaeological Essays, Vol. 1 • James Y. Simpson

... should influence the choice of a locality is its capability for defense. If the camp be pitched beside a stream, a concave bend, where the water is deep, with a soft alluvial bed inclosed by high and abrupt banks, will be the most defensible, and all the more should the concavity form a peninsula. The advantages of such a position are obvious to a soldier's eye, as that part of the encampment inclosed by the stream is naturally secure, and leaves only one side to be defended. The concavity of the bend will enable the defending party to cross ...
— The Prairie Traveler - A Hand-book for Overland Expeditions • Randolph Marcy

... its first dramatic appearance, was one of the most astonishing things that we saw in the whole course of our adventures. It was not a cerulean vault like that which covers the earth in halcyon weather, but an indescribably soft, pinkish-gray concavity that seemed nearer than the sky and yet farther than the clouds. Here and there, far beneath it, but still at a vast elevation, floated delicate gauzy curtains, tinted like sheets of mother-of-pearl. The sun was no longer visible, but the air was filled ...
— A Columbus of Space • Garrett P. Serviss

... of flesh of a subdued mahogany tint; about her temples, and the lower part of her cheeks, were all those harmonizing wrinkles which become old age—upon canvas—while, below her chin, communicating with a small and shrunken neck, was that sort of concavity, or dewlap, which painters delight to express with a minuteness of touch, and mellowness of tint, that contribute largely to picturesque effect! This good old woman received us with perfect elasticity ...
— A Bibliographical, Antiquarian and Picturesque Tour in France and Germany, Volume One • Thomas Frognall Dibdin

... beautiful fabric of the Corn Hall of Paris, designed by Monsieur le Grand. The dome of the bank of England is in the same style, but inferior, in point of lightness and elegance. That of the Corn Hall resembles a vast concavity of glass. In this noble building the millers deposit their corn for sale. Its deep and lofty arches and area, were nearly filled with sacks, containing that grain which is precious to all nations, but to none more than the french; to a frenchman, bread is most emphatically ...
— The Stranger in France • John Carr

... cutting away the rock, both in the chapel-chambers and in the vestibules or porches which precede them. These columns are polygonal in some cases, clustered in others. The former type, with eight, sixteen, or thirty-two sides (in these last the arrises or edges are emphasized by a slight concavity in each face, like embryonic fluting), have a square abacus, suggesting the Greek Doric order, and giving rise to the name proto-Doric (Fig.6). Columns of this type are also found at Karnak, Kalabsh, Amada, and Abydos. Areminiscence ...
— A Text-Book of the History of Architecture - Seventh Edition, revised • Alfred D. F. Hamlin

... are parallel, the reflected rays converge to a focus, but when the incident rays proceed from a focus, or are divergent, they are reflected parallel. It is only when an object is nearer to a concave mirror than its centre of concavity, that its image is magnified; for when the object is farther from the mirror, this centre will appear less than the object, ...
— The History and Practice of the Art of Photography • Henry H. Snelling

... Colosseum, whose sublimity of size, however, can afford to dispense with detail. The seats at Nimes, like those at Verona, have been largely renewed; not that this mattered much, as I lounged on the cool surface of one of them, and admired the mighty concavity of the place and the elliptical sky- line, broken by uneven blocks and forming the rim of the monstrous cup, - a cup that had been filled with horrors. And yet I made my reflections; I said to myself that though a Roman arena is one of the most impressive ...
— A Little Tour in France • Henry James

... terrible—his clothes hung on him like bags; as the bishop said, it was ghastly to see a convexity change to such a concavity in three days. ...
— Where There's A Will • Mary Roberts Rinehart

Words linked to "Concavity" :   solid, conformation, cup, depression, bowl, incurvature, indenture, corner, indentation, trough, scoop, configuration, recession, fossa, pit, hollowness, recess, imprint, shape, pocket, contour, concave shape, form, dome, impression, concave, niche

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