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Quadrant   Listen
noun
Quadrant  n.  
1.
The fourth part; the quarter. (Obs.)
2.
(Geom.) The quarter of a circle, or of the circumference of a circle, an arc of 90°, or one subtending a right angle at the center.
3.
(Anal. (Geom.) One of the four parts into which a plane is divided by the coordinate axes. The upper right-hand part is the first quadrant; the upper left-hand part the second; the lower left-hand part the third; and the lower right-hand part the fourth quadrant.
4.
An instrument for measuring altitudes, variously constructed and mounted for different specific uses in astronomy, surveying, gunnery, etc., consisting commonly of a graduated arc of 90°, with an index or vernier, and either plain or telescopic sights, and usually having a plumb line or spirit level for fixing the vertical or horizontal direction.
Gunner's quadrant, an instrument consisting of a graduated limb, with a plumb line or spirit level, and an arm by which it is applied to a cannon or mortar in adjusting it to the elevation required for attaining the desired range.
Gunter's quadrant. See Gunter's quadrant, in the Vocabulary.
Hadley's quadrant, a hand instrument used chiefly at sea to measure the altitude of the sun or other celestial body in ascertaining the vessel's position. It consists of a frame in the form of an octant having a graduated scale upon its arc, and an index arm, or alidade pivoted at its apex. Mirrors, called the index glass and the horizon glass, are fixed one upon the index arm and the other upon one side of the frame, respectively. When the instrument is held upright, the index arm may be swung so that the index glass will reflect an image of the sun upon the horizon glass, and when the reflected image of the sun coincides, to the observer's eye, with the horizon as seen directly through an opening at the side of the horizon glass, the index shows the sun's altitude upon the scale; more properly, but less commonly, called an octant.
Quadrant of altitude, an appendage of the artificial globe, consisting of a slip of brass of the length of a quadrant of one of the great circles of the globe, and graduated. It may be fitted to the meridian, and being movable round to all points of the horizon, serves as a scale in measuring altitudes, azimuths, etc.






Collaborative International Dictionary of English 0.48








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"Quadrant" Quotes from Famous Books



... Which great quadrant and square woorke, ioyned not fast to the collaterate and sidelying rockes, but was betwixt spaced and seperated on eyther sides tenne paces. Vpon the right hand as I went of the aforesaid plynth or square sheame, there was most ...
— Hypnerotomachia - The Strife of Loue in a Dreame • Francesco Colonna

... are they? A. A square, a single compass, a compass with four points, a rule, a line, a compass of perfection, a quadrant, a level ...
— The Mysteries of Free Masonry - Containing All the Degrees of the Order Conferred in a Master's Lodge • William Morgan

... quadrants of the circle of the world, arose low- rolling hills, smooth, fenced, cropped, and pastured, that melted into higher hills and steeper wooded slopes that merged upward, steeper, into mighty mountains. The fourth quadrant was unbounded by mountain walls and hills. It faded away, descending easily to vast far flatlands, which, despite the clear brittle air of frost, were too vast and ...
— The Little Lady of the Big House • Jack London

... the shed, from which all the wounded men had now been removed and which had since remained untenanted, Nuttall had concealed the necessary stores: a hundredweight of bread, a quantity of cheese, a cask of water and some few bottles of Canary, a compass, quadrant, chart, half-hour glass, log and line, a tarpaulin, some carpenter's tools, and a lantern and candles. And in the stockade, all was likewise in readiness. Hagthorpe, Dyke, and Ogle had agreed to join the venture, and eight others had been carefully recruited. In Pitt's hut, ...
— Captain Blood • Rafael Sabatini

... Edward Wright had taught its true principles, and about half a century before the voyage of the Roebuck such improvements as Gunter's application of logarithms to nautical calculations, middle latitude sailing, and the measurement of a degree on the meridian were introduced. Hadley's quadrant came thirty years after Dampier, who must have used Davis' instrument, then about ninety years old. Davis' work on navigation, with Wright's chart showing the northern extremity of Australia, and Addison's Arithmetical Navigation (1625) were, no doubt, text-books on board the Roebuck. Longitude ...
— The Naval Pioneers of Australia • Louis Becke and Walter Jeffery

... 83. Regent Street, Quadrant, LADIES of taste for fancy work,—by paying 21s. will be received as members, and taught the new style of velvet wool work, which is acquired in a few easy lessons. Each lady will be guaranteed constant employment and ready ...
— Notes and Queries, Number 201, September 3, 1853 • Various

... dramatists. It is, on the contrary, a code actually received and obeyed by great numbers of people. We need not go to Utopia or Fairyland to find them. They are near at hand. Every night some of them cheat at the hells in the Quadrant, and others pace the Piazza in Covent Garden. Without flying to Nephelococcygia or to the Court of Queen Mab, we can meet with sharpers, bullies, hardhearted impudent debauchees, and women worthy of such paramours. ...
— Critical and Historical Essays, Volume III (of 3) • Thomas Babington Macaulay

... observed appears to be 8' or 10' too little; and if so, the length of the beach would be something more than 150 miles. It is no matter of surprise if observations taken from an open boat, in a high sea, should differ ten miles from the truth; but I judge that Mr. Bass' quadrant must have received some injury during the night of the 31st, for a similar error appears to pervade all the future observations, even ...
— A Voyage to Terra Australis • Matthew Flinders

... where Disko kept the old greencrusted quadrant that they called the "hog-yoke"—under the bed-bag in his bunk. When he took the sun, and with the help of "The Old Farmer's" almanac found the latitude, Harvey would jump down into the cabin and scratch the reckoning ...
— "Captains Courageous" • Rudyard Kipling

... Achilles, and the woes of Greece;" would it were so in England. Then, my poetical public, we should have Anacreon Moore singing his "Rich and rare were the gems she wore," in some such place as the Quadrant, or Opera Colonnade; and Sir Walter Scott celebrating the Field of Waterloo, not in the broad-margined octavos of Paternoster-row, but about the purlieus of the Horse Guards. Wordsworth would be his own Skylark. ...
— The Mirror of Literature, Amusement, and Instruction - Vol. 12, Issue 330, September 6, 1828 • Various

... natives. At this moment the men, one and all, still grasping their respective slew-ropes firmly in their hands, and without bending a joint in their whole bodies, fell simultaneously on their backs, flat on the water! The effect of this sudden movement was to turn the cylinder a full quadrant, or one quarter of a revolution. This, of course, brought a considerable strain on the hawser fixed to the anchor. On a second signal being given, every alternate pair of men gradually crept up the spars by means of their slew-ropes, till one-half ...
— The Lieutenant and Commander - Being Autobigraphical Sketches of His Own Career, from - Fragments of Voyages and Travels • Basil Hall

... day of the calm, all on board suffering much from the heat, and want of water, and five having died in fits, and mad, the negroes became irritable, and for a chance gesture, which they deemed suspicious—though it was harmless—made by the mate, Raneds, to the deponent in the act of handing a quadrant, they killed him; but that for this they afterwards were sorry, the mate being the only remaining navigator on board, ...
— The Piazza Tales • Herman Melville

... which sailors measured the height of the sun above the horizon at noon, and could thus tell the distance of the ship from the equator. It is in use on all the ships at the present time, but it has been greatly improved, and is now called the quadrant. ...
— Discoverers and Explorers • Edward R. Shaw

... were ordered to be apprehended, and put into the castle. One of the men, and the woman, fled into the woods; but were soon taken. They confessed they were English convicts, and that they had made their escape from Botany Bay. They had been supplied with a quadrant, a compass, a chart, and some small arms and ammunition, from a Dutch ship that lay there; and the expedition was conducted by the Governor's fisherman, whose time of transportation was expired. He was a good seaman, and a tolerable ...
— Voyage of H.M.S. Pandora - Despatched to Arrest the Mutineers of the 'Bounty' in the - South Seas, 1790-1791 • Edward Edwards

... do Plane, Traverse, Middle-Latitude, and Mercator's Sailing," I answered. "I can also do a Day's Work; I can use my quadrant with accuracy; can find the Latitude by a meridian altitude of the sun, moon, or a star; can find the error and rate of the chronometer, and also the longitude by it; can determine the variation of the compass; can find the longitude by a 'lunar'; can do the Pole Star problem; ...
— A Middy of the King - A Romance of the Old British Navy • Harry Collingwood

... the barometer, for I know he had them both," resumed the aunt. "Barometer, or thermometer, it do n't make any great difference; or quadrant, or sextant. They are all instruments, and sometimes he used one, and sometimes another. Sailors take on board the sun, too, and have an instrument for that, as well as one to weigh the weather with. ...
— Jack Tier or The Florida Reef • James Fenimore Cooper

... support of 1724 Lilliputians. Some time after, asking a friend at court, how they came to fix on that determinate number, he told me, that his majesty's mathematicians having taken the height of my body by the help of a quadrant,[22] and finding it to exceed theirs in the proportion of twelve to one, they concluded, from the similarity of their bodies, that mine must contain at least 1724 of theirs, and consequently would require as much food ...
— Gulliver's Travels - Into Several Remote Regions of the World • Jonathan Swift

... professor's right, as he stood at the tiller, was an upright lever working in a quadrant, and communicating, like the tiller—and indeed all the other apparatus—with the interior ...
— The Log of the Flying Fish - A Story of Aerial and Submarine Peril and Adventure • Harry Collingwood

... to clamber from our mainyard into the very top of the Englishman, where he threw a hand-grenade, as I thought, down her main hatch. An instant after an explosion came like a, clap of thunder in our faces, and a great quadrant of light flashed as high as the 'Serapis's' trucks, and through a breach in her bulwarks I saw men running with only the collars of their ...
— The Crossing • Winston Churchill

... how variegated pain you may have in the abdomen, or how high your temperature may run, if you are not distinctly sore on firm pressure down in this right lower or southwest quadrant of the abdomen,—but be careful not to press too hard, it isn't safe,—you may feel fairly sure that you haven't got appendicitis. If you are, you may still not have it, but you'd better send for the doctor, ...
— Preventable Diseases • Woods Hutchinson

... of note-paper, and, with a camel-hair brush, the precipitate is gently brought into the glass. Most precipitates come away easily, and the transfer can be made without apparent loss. The watch-glass is covered by the funnel, and the filter-paper (folded into a quadrant) held by the tweezers and set fire to with the flame of a Bunsen burner. It is allowed to burn over the crucible, into which the black bulky ash is allowed to drop, and two or three drops of nitric ...
— A Textbook of Assaying: For the Use of Those Connected with Mines. • Cornelius Beringer and John Jacob Beringer

... man of fashion, like other animals, has his peculiar habitat: you never see him promenading in Regent Street between the hours of three and five in the afternoon, nor by any chance does he venture into the Quadrant: east of Temple Bar he is never seen except on business, and then, never on foot: if he lounges any where, it is in Bond Street, or about the ...
— Blackwood's Edinburgh Magazine, No. CCCXXVIII. February, 1843. Vol. LIII. • Various

... within the narrow circle of his early knowledge he would attempt to imitate. He saw no difficulties before hand, nor was he discouraged when he met with them. At the early age of eleven years, he had somewhere seen a dial and a quadrant, and was able to imitate these instruments, nay, with the assistance of the latter, and the small knowledge of arithmetic and trigonometry, which he had then obtained, he formally marched out with his younger brother, ...
— Popular Lectures on Zoonomia - Or The Laws of Animal Life, in Health and Disease • Thomas Garnett

... practice makes him perfect. Watt's mission saved him from this, for to succeed he had to be master, not of one process, but of all. Hence we find him first making brass scales, parallel-rulers and quadrants. By the end of one month in this department he was able to finish a Hadley quadrant. From this he proceeded to azimuth compasses, brass sectors, theodolites, and other delicate instruments. Before his year was finished he wrote his father that he had made "a brass sector with a French joint, which is reckoned as nice a piece of framing-work ...
— James Watt • Andrew Carnegie

... all pins except those of the four corner guy ropes, or the four quadrant guy ropes in the case of the conical wall tent. The pins are neatly piled or ...
— Infantry Drill Regulations, United States Army, 1911 - Corrected to April 15, 1917 (Changes Nos. 1 to 19) • United States War Department

... existed, and that he would not allow the boat to be cast off until the captain was received on board. This brief respite gave Spike a moment to care for his portion of the doubloons; and he rushed to his state-room to secure them, together with his quadrant. ...
— Jack Tier or The Florida Reef • James Fenimore Cooper

... years Tycho spent in various places ardently pursuing somewhat varied branches of scientific study. At one time we hear of him assisting an astronomical alderman, in the ancient city of Augsburg, to erect a tremendous wooden machine—a quadrant of 19-feet radius—to be used in observing the heavens. At another time we learn that the King of Denmark had recognised the talents of his illustrious subject, and promised to confer on him a pleasant sinecure in the ...
— Great Astronomers • R. S. Ball

... hundred and twenty leguas. The capital of Cagayan is the city of Nueba Segobia, which was settled by Governor Don Goncalo Ronquillo de Penalosa in fifteen hundred and eighty-one. The shape of this island of Luzon, taken as a whole, is more like a semi-quadrant than anything else, although there are many irregularities in places. Some parts are narrow, because of the numerous arms of the sea which bound and penetrate the island; but in some parts, principally those on the north side, the island grows broader and more ...
— The Philippine Islands, 1493-1898: Volume XVIII, 1617-1620 • Various

... he had done the same with his two other sisters, Tertia, whom Marcius Rex, and Clodia, whom Metellus Celer had married; the latter of whom was called Quadrantia, because one of her lovers had deceived her with a purse of small copper money instead of silver, the smallest copper coin being called a quadrant. Upon this sister's account, in particular, Clodius's character was attacked. Notwithstanding all this, when the common people united against the accusers and witnesses and the whole party, the judges were affrighted, and a guard was placed about them for their defense; ...
— Plutarch's Lives • A.H. Clough

... name in every country that he visited. The Chaldeans, for instance, give us his story, merely altering his name into Xisuthrus—a trivial alteration, which to an historian skilled in etymologies will appear wholly unimportant. It appears, likewise, that he had exchanged his tarpaulin and quadrant among the Chaldeans for the gorgeous insignia of royalty, and appears as a monarch in their annals. The Egyptians celebrate him under the name of Osiris; the Indians as Menu; the Greek and Roman writers confound him with Ogyges; ...
— Knickerbocker's History of New York, Complete • Washington Irving

... rising sun. I had a complete observation of the progress and the close of the eclipse. I determined the distance of the horns, or the differences of altitude and azimuth, by the passage over the threads of the quadrant. The eclipse terminated at 2 hours 14 minutes 23.4 seconds ...
— Equinoctial Regions of America • Alexander von Humboldt

... anasbleki. Quack cxarlatano. Quackery cxarlatanismo. Quadrangle kvarangulajxo. Quadrant kvadranto. Quadrate kvadrato. Quadrate kvadrata. Quadratic kvadrata. Quadrature kvadrato. Quadrille kvadrilo. Quadruped kvarpieda. Quadruple kvarobla. Quaff glutegi. Quaggy marcxa. Quagmire marcxejo. Quail (bird) ...
— English-Esperanto Dictionary • John Charles O'Connor and Charles Frederic Hayes

... human skeletons, and whitings in abundance, swimming between their ribs. I brought up my old quadrant out of the starboard wing, where I was adjusting it when the alarm was given. I found it lying on the table just where I left it. I never shall forget what a d——d rap we hit the old Queen Charlotte, with our larboard broadside; every ...
— Frank Mildmay • Captain Frederick Marryat

... battery, whose exciting fluid is water. They are used for charging quadrant electrometer needles and similar purposes. They polarize very quickly and are of high resistance. Hence very small plates in large number can be used without impairing ...
— The Standard Electrical Dictionary - A Popular Dictionary of Words and Terms Used in the Practice - of Electrical Engineering • T. O'Conor Slone

... resided over thirteen years at Highbury, London, N., during my pastorate of the Highbury Quadrant ...
— Carry On • Coningsby Dawson

... in the northwest quadrant of Mars, chart M, area twenty-eight. You have been notified by the control deck that it has been necessary to jettison three quarters of your fuel supply. For the last five hundred and seventy-nine ...
— Stand by for Mars! • Carey Rockwell

... vertically. On the upper part of the axis is placed a disc of card, on which are drawn four concentric rings. Each ring is divided into four quadrants, which are coloured red, yellow, green, and blue. The spaces between the rings are white. When the top is in motion, it is easy to see in which quadrant the instantaneous axis is at any moment and the distance between it and the axis of the instrument; and we observe,—1st. That the instantaneous axis travels in a closed curve, and returns to its original position in the body. 2ndly. That by working the vertical bolts, ...
— Five of Maxwell's Papers • James Clerk Maxwell

... to be built for George IV. in Regent's Park. Nash's great idea, the combining of many separate buildings into one uniform facade, is here seen at its best. At first a lengthy colonnade supported by columns 16 feet high ran on either side of the quadrant, but this darkened the shops, so it was removed. The street is famous for its shops, which line it from end to end; it has also the merit of being wider than most of the ...
— The Strand District - The Fascination of London • Sir Walter Besant

... influence, has the making, or rather marring, of all the liveries of the Hall; which generally look as though they had been cut out by one of those scientific tailors of the Flying Island of Laputa, who took measure of their customers with a quadrant. The tailor, in fact, might rise to be one of the moneyed men of the village, were he not rather too prone to gossip, and keep holidays, and give concerts, and blow all his substance, real and personal, ...
— Bracebridge Hall, or The Humorists • Washington Irving

... Province House, bedazzling the eyes of those who looked upward, like an angel of the sun. Another work of the good deacon's hand—a reduced likeness of his friend Captain Hunnewell, holding a telescope and quadrant—may be seen to this day, at the corner of Broad and State streets, serving in the useful capacity of sign to the shop of a nautical instrument maker. We know not how to account for the inferiority of this quaint old figure, as compared with the ...
— Mosses from an Old Manse and Other Stories • Nathaniel Hawthorne

... seventeenth century, the instrument used was of this simple kind. It was generally a large quadrant, with one or two bars moving on a hinge,—to all intents and purposes a huge pair of compasses. The direction of the sight was fixed by the use of a slit and a pointer, much as in the ordinary rifle. This instrument was vastly improved by the ...
— Men of Invention and Industry • Samuel Smiles

... the mates, that we had made a very capital fall upon the trades, and that we were getting on wonderfully well, though it was quite as great a mystery to them as it was to me, how the captain could know where the ship was; for he had not touched his quadrant, except to wipe it with a silk handkerchief, since we left England. About a fortnight after we had passed the Cape de Verds, Noah came on deck in a great rage, and began to storm at the mate and the man at the wheel for not keeping the ship her course. To this the former answered with spirit, ...
— The Monikins • J. Fenimore Cooper

... escapes; but he liked best of all to trudge along the sands with the guard on dark nights, lantern in hand, watching for ships in distress. The captain of the crew, who was an old seaman, taught him the use of the compass and quadrant, and other matters of navigation, while the rest showed him how to pull an oar, steer, and swim, until he could manage a boat as well as any ...
— Harper's Young People, September 7, 1880 - An Illustrated Weekly • Various

... From this spot alone can the magnificence of Regent-street be duly appreciated, and above all the skill of the architect in effecting the junction of the lines by the classical introduction of the Quadrant. ...
— The Mirror of Literature, Amusement, and Instruction, Vol. 20, No. - 582, Saturday, December 22, 1832 • Various

... for the qualification of officers of that description, namely, whether he understand navigation, is competent to lay off and ascertain courses and distances on the charts, can work a day's work and find the time of high and low water in any port of great Britain, and understand the use of a quadrant." ...
— King's Cutters and Smugglers 1700-1855 • E. Keble Chatterton

... already here, when thou must write The absolute total of thy life's vast sum. The constellations stand victorious o'er thee, The planets shoot good fortune in fair junctions, And tell thee, "Now's the time!" The starry courses Hast thou thy life long measured to no purpose? The quadrant and the ...
— The German Classics of The Nineteenth and Twentieth Centuries, Vol. III • Kuno Francke (Editor-in-Chief)

... position he held till his death; his "Canon Triangulorum" (1620) was the first table of logarithmic sines and tangents drawn up on Briggs's system; amongst other of his inventions was the surveying chain, a quadrant, Gunter's scale, and he was the first to observe the variations of the ...
— The Nuttall Encyclopaedia - Being a Concise and Comprehensive Dictionary of General Knowledge • Edited by Rev. James Wood

... "sacredness" of the number was of much more recent date than the creation of the worlds, and could not therefore account for it. He next tried an ingenious idea, comparing the perpendiculars from different points of a quadrant of a circle on a tangent at its extremity. The greatest of these, the tangent, not being cut by the quadrant, he called the line of the sun, and associated with infinite force. The shortest, being the point at ...
— Kepler • Walter W. Bryant

... uncle, left the exact knowledge of the mariner's faculties, as it were by inheritance, after his death, for he is a very expert master in the knowledge of the compass and the elevation of the pole star by the quadrant. He is my particular friend, a witty young man in whose company I take great pleasure, and therefore have him often ...
— Amerigo Vespucci • Frederick A. Ober

... fitter plan? Will he insist that the rust is not rust, or that it is a rust sui generis, intentionally formed on the steel for some mysterious virtue in it, and that the staff and astrolabe of a shepherd-astronomer are identical with, or equivalent to, the quadrant and telescope of Newton or Herschel? Or will he not rather give the curious inquisitor joy of his mighty discoveries, and the credit of them for ...
— Confessions of an Inquiring Spirit etc. • by Samuel Taylor Coleridge



Words linked to "Quadrant" :   quarter-circle, measuring instrument, country, measuring system, line



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