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Concavity   Listen
noun
Concavity  n.  (pl. concavities)  A concave surface, or the space bounded by it; the state of being concave.






Collaborative International Dictionary of English 0.48








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"Concavity" Quotes from Famous Books



... cultivators of natural history. The wild animals are kept, in their respective cages, out of doors, which is equally salutary for themselves and agreeable to their visitors. I was much struck by the perpetual motion of a huge, restless, black bear, who has left the marks of his footsteps by a concavity in the floor:—as well as by the panting, and apparently painful, inaction of an equally huge white or gray bear—who, nurtured upon beds of Greenland ice, seemed to be dying beneath the oppressive heat of a Parisian atmosphere. The same misery appeared to beset the bears ...
— A Bibliographical, Antiquarian and Picturesque Tour in France and Germany, Volume Two • Thomas Frognall Dibdin

... open and shut the four openings which are in these two concavities; to wit, three at the entry of the vena cava, where they are so disposed, that they can no wayes hinder the bloud which it contains from running into the right concavity of the heart; and yet altogether hinder it from coming out. Three at the entry of the arterious vein; which being disposed quite contrary, permit only the bloud which is in that concavity to pass to the lungs; but not that which is in the lungs ...
— A Discourse of a Method for the Well Guiding of Reason - and the Discovery of Truth in the Sciences • Rene Descartes

... elephant is exceedingly convex; that of the African is exactly the reverse, and the concavity behind the shoulders is succeeded by a peculiarity in the sudden rise of the spine above the hips. The two species are not only distinct in certain peculiarities of form, but they differ in their habits. The Indian elephant dislikes the sun, and invariably retreats to thick shady ...
— The Nile Tributaries of Abyssinia • Samuel W. Baker

... methods of eliminating errors when found; but I must content myself with giving a description of various methods of detecting existing errors in the surfaces that are being worked, whether, for instance, it be an error of concavity, ...
— Scientific American Supplement, No. 484, April 11, 1885 • Various

... 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 ...
— The Prairie Traveler - A Hand-book for Overland Expeditions • Randolph Marcy

... the third figure, let AILD represent an including solid medium of a cylindrical shape (as suppose a small Glass Jar) Let FGEMM represent a contain'd fluid, as water; this towards the bottom and sides, is figured according to the concavity of the Glass: But its upper Surface, (which by reason of its gravity, (not considering at all the Air above it, and so neither the congruity or incongruity of either of them to the Glass) should be terminated ...
— Micrographia • Robert Hooke

... 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 was made." "The workmanship" ...
— Archaeological Essays, Vol. 1 • James Y. Simpson

... 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 ...
— A Columbus of Space • Garrett P. Serviss

... boat are two planes parallel with its axis, and perfectly vertical. The keel (properly so called) is formed by the joining of the two vertical planes. The surface thus formed is a parabola whose apex is in front, the maximum ordinate behind, and the concavity directed toward the bottom of the water. The stern is a vertical plane intersecting at right angles the two lateral faces and the parabolic curve, which thus terminates in a sharp edge. The prow of the boat is connected with the apex of the parabola ...
— Scientific American Supplement, No. 385, May 19, 1883 • Various

... of its length. The frame should be of light spruce, the same size as the cross-pieces. Care must be taken to have the angles right. When the frame is finished, cover loosely with manila paper, so that there will be some concavity on the face of the kite on each side below the cross-stick, so that it will belly like a sail; bind the edges with thin wire which stretches less than string. This kite will fly in a very light breeze. The string, particularly if you have a tandem, ...
— Healthful Sports for Boys • Alfred Rochefort

... field. The nucleated cells found connected with the cancellated structure of the bones, which I first pointed out and had figured in 1847, and have shown yearly from that time to the present, and the fossa masseterica, a shallow concavity on the ramus of the lower jaw, for the lodgment of the masseter muscle, which acquires significance when examined by the side of the deep cavity on the corresponding part in some carnivora to which it answers, may perhaps be claimed as deserving attention. I have also pleased ...
— Medical Essays • Oliver Wendell Holmes, Sr.

... we got on the somewhat firmer but still heavy plain. It was very clear, however, that our horses would not go a day's journey over such ground. It looked exactly as I have described it—an immense concavity, with numerous small channels running down from every part, and making for the creek as a centre of union; nor, could we anywhere see a termination to it. Had the plain been of less extent, I might have doubted the information of the natives; but, looking at the boundless hollow around ...
— Expedition into Central Australia • Charles Sturt

... filmed with oil, the life-blood of the stricken submarine. Presently the concavity in the ocean mounted to level, and its rotation slowly died away. The American found that his arms had unwittingly clasped something which proved to be an empty tin canister with a screw top. He hung to it apathetically. His ...
— The Cruise of the Dry Dock • T. S. Stribling

... cache, cave, cavern, hollow, depression, perforation, puncture, rent, slit, crack, chink, crevice, cranny, breach, cleft, chasm, fissure, gap, opening, interstice, burrow, crater, eyelet, pore, bore, aperture, orifice, vent, concavity, dent, indentation. > ...
— The Century Vocabulary Builder • Creever & Bachelor

... body forms about four-fifths of the entire globe, It fills the concavity of the retina and is hollowed in front, forming a deep cavity, for the reception of the lens. It is perfectly transparent and of the consistency of thin jelly. The fluid from the vitreous body resembles nearly pure water. The crystalline lens ...
— Mother's Remedies - Over One Thousand Tried and Tested Remedies from Mothers - of the United States and Canada • T. J. Ritter

... down which many had been cast headlong. There we found one poor Soldier alive, who, upon his throwing in, had catch'd fast hold of some impending Bushes, and sav'd himself on a little Jutty within the Concavity. On hearing us talk English he cry'd out; and Ropes being let down, in a little Time he was drawn up; when he gave us an ample Detail of the whole Villany. Among other Particulars, I remember he told me of ...
— Military Memoirs of Capt. George Carleton • Daniel Defoe

... Audubon, though Wilson describes the nest of one which he saw near Great Egg Harbor, in the top of a large yellow pine. It was a vast pile of sticks, sods, sedge, grass, reeds, etc., five or six feet high by four broad, and with little or no concavity. It had been used for many years, and he was told that the eagles made it a sort of home or lodging-place in all seasons. This agrees with the description which Audubon gives of the nest of the bald eagle. There is evidently a little ...
— A Book of Natural History - Young Folks' Library Volume XIV. • Various

... swiftly to concavity, as the Sandra was expertly jockeyed through the rare outer layer of the stratosphere, became a true ...
— The Passing of Ku Sui • Anthony Gilmore

... concave downwards, was fitted into the recess turned out in the neck of the press-cylinder, at the place formerly used as a stuffing-box. Immediately on the high pressure water being turned on, it forced its way into the leathern concavity and 'flapped out' the bent edges of the collar; and, in so doing, caused the leather to apply itself to the surface of the rising ram with a degree of closeness and tightness so as to seal up the joint the closer exactly in proportion to the pressure of ...
— Industrial Biography - Iron Workers and Tool Makers • Samuel Smiles

... the Byzantine period, is indicative of a tendency to transition; namely, that the sharp furrow is now drawn only to the central lobe of each division of the leaf, and the rest of the surface of the leaf is left nearly flat, a slight concavity only marking the division of the extremities. At the base of these leaves they are perfectly flat, only cut by the sharp and narrow furrow, as an elevated ...
— The Stones of Venice, Volume III (of 3) • John Ruskin

... distinguished Greek architecture than the variety, the grace, and the beauty of the mouldings, generally in eccentric curves. The general outline of the moulding is a gracefully flowing cyma, or wave, concave at one end and convex at the other, like an Italic f, the concavity and convexity being exactly in the same curve, according to the line of ...
— Beacon Lights of History, Volume III • John Lord

... crushing), 5.0 mm. in length, and has two unequal heads; its width across both of these is 4.0 mm. The length is appropriate to fit between the lateral face of the otic capsule and the dorsal edge of the quadrate; the wider head rests on a posterodorsal concavity on the otic capsule, and the smaller fits a lower, more anterior pit. Laterally the stapes carries a short, broad process that probably made contact with a dorsally placed tympanic membrane. Thus the bone was a hyomandibular in the sense that it articulated with the quadrate, but it ...
— A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas • Theodore H. Eaton

... Large and well-cut cylinder-seals of fine limestone, lapis, diorite, granite, and shell are characteristic of the period: they are generally of an easily recognizable form (reel-shaped) with sides showing a marked concavity (see XIV, Fig. 5). The great development of art is shown by the stele of Naram-Sin (Louvre) found at Susa. Not many mounds of ...
— How to Observe in Archaeology • Various

... to the hollowness of the seventh sphere: passing up through the hollowness or concavity of the spheres, which all revolve round each other and are all contained by God (see note 5 to the Assembly of Fowls), the soul of Troilus, looking downward, beholds the converse or convex side of the spheres which it ...
— The Canterbury Tales and Other Poems • Geoffrey Chaucer

... larva, as a convex ceiling would. The subsequent disks, when the pile is numerous, are a little larger; they only fit the mouth by yielding to pressure and becoming concave. The Bee seems to make a point of this concavity, for it serves as a mould to receive the curved ...
— Bramble-bees and Others • J. Henri Fabre

... off, and a wadded dressing-gown put on for the night. The Japanese pillow is a little lacquered box with drawers in it, in which the ladies keep various small articles for their toilet—paper, hair-arrows, pins, etcetera. In the top of this curious box is a concavity with a little cushion wrapped in clean paper, and on this the back of the head is rested. Thus their head-dresses are not tumbled at night. The inhabitants of the Fiji Islands use a similar pillow for the same object of preventing their elaborately-dressed hair ...
— In the Eastern Seas • W.H.G. Kingston



Words linked to "Concavity" :   cup, configuration, trough, concaveness, scoop, dome, incurvation, hollowness, niche, corner, indenture, recession, impression, incurvature, concave, contour, form, fossa



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