| 释义 |
▪ I. disc, disk|dɪsk|
[ad. L. disc-us, a. Gr. δίσκος quoit, dish, disc: cf. F. disque, (1556).
The earlier and better spelling is disk, but disc is now the more usual form in British English, except in sense 2 g, where disk is commoner as a result of US influence.]
1. The discus or quoit used in ancient Greek and Roman athletic exercises; the game played with this. Obs. exc. Hist. (Cf. dish n. II.)
1715–20Pope Iliad ii. 941 In empty air their sportive jav'lins throw, Or whirl the disk. 1727–51Chambers Cycl., Disc or Disk, Discus, in antiquity, a kind of round quoit..about a foot over, used by the antients in their exercises. 1728Newton Chronol. Amended 36 The Disc was one of the five games called the Quinquertium. 1791Cowper Iliad ii. 948 His soldiers hurled the disk or bent the bow. 1835Thirlwall Greece I. viii. 329 He could run, leap, wrestle, hurl the disk. 1876Dowden Poems 67 In manage of the steed Or shooting the swift disc.
2. a. A thin circular plate of any material.
1803Med. Jrnl. X. 26 Volta constructed a pile made up of disks of different metals with layers of cloth interposed. 1827Faraday Chem. Manip. xxiii. 568 Clipping fragments of plate glass into circular discs. 1865Lubbock Preh. Times vi. (1878) 283 A small oval disk of white sandstone. 1872Ruskin Eagle's Nest §224 The shield [is] a disk of leather, iron fronted. 1881Greener Gun 198 Allowing the breech-ends to rise clear of the discs.
†b. Used poet. of a shield.
1791Cowper Iliad xi. 528 Ulysses' oval disk he smote. Through his bright disk the stormy weapon flew.
c. spec. In ancient armour, a plate of metal used to protect the body at certain joints of the armour; a roundel.
d. A phonograph or gramophone record. Also attrib. and Comb.
1888Leisure Hour 209/1 A disc about eleven inches in diameter can, it is said, contain four minutes' talk. 1907Sound Wave & Talking Machine Record Dec. 60/2 The world today always associates Edison's phonograph with a cylinder apparatus, but the first phonograph we look at in this patent is a disc (he called it a disk) machine. 1919A. Seymour Good-bye-ee!, A gramaphone [sic] record with the picture of a foxterrier on the disc. 1929Sunday Dispatch 20 Jan. 16 A fine disc by his orchestra. 1941B.B.C. Gloss. Broadc. Terms 9 Disc recording. (1) Process of registering sound by electro-mechanical means in the form of lateral corrugations in a spiral groove on a disc coated with, or composed of, plastic material. (2) (Also Disc.) Disc on which sound has been so recorded. (3) (By extension.) Programme material so recorded. 1951Ann. Reg. 1950 386 A whole classical symphony could be recorded on the two sides of a 12-inch disc without any break in the course of the movements. 1958Listener 18 Dec. 1049/2 The puerile pop singer who becomes the demi-god of the frenzied disc-addicts. 1962Melody Maker 7 July 4 His discs have sold in millions all over the globe... He doesn't make hit discs today. 1962A. Nisbett Technique Sound Studio vii. 134 Disc editing. Discs are edited by dubbing (i.e. copying), and extensive professional equipment is required. 1968Listener 27 June 845/3 The only complete opera-in-English available on disc in this country.
e. Short for identity disc (see identity).
a1918W. Owen Poems (1931) 104 Let my inscription be this soldier's disc.
f. In full parking disc. A device used in disc parking.
1960Economist 9 Apr. 193/3 A parking disc is a device a driver himself displays on his vehicle to show the time he arrived or the time he ought to leave a parking area, or both times. 1970Oxford Mail 13 July 6 Whilst there is adequate warning, on entry into the city, that disc parking is operative it does seem ridiculous that an ample supply of discs is not readily available from garages, stores and traffic wardens.
g. Computing. A rotatable disc used to store data in digitally coded form, e.g. in a magnetic coating or optically. Cf. compact disc s.v. compact ppl. a.1 II. 1 c, floppy disc s.v. floppy a. 2, hard disc s.v. hard a. 22 c, optical disc s.v. optical a. 6.
See the note to the etymology for the spelling of disc in this sense.
1947Math. Tables & Other Aids Computation II. 229 The program of the Symposium was as follows:.. 4. ‘Magnetic and phosphor coated disks’ by Dr. B. L. Moore. 1952Electr. Engin. Aug. 745/1 The new ‘memory’ stores data in the form of magnetic pulses on both sides of thin metal disks. Ibid. 745/2 When the heads are in position, the disk is rotated past them while information, in the form of coded magnetic pulses, is recorded or read out. 1956Proc. 9th Western Joint Computer Conf. 42/1 The information is stored, magnetically, on 50 rotating disks. 1964T. W. McRae Impact of Computers on Accounting i. 8 This machine stored its records on the ‘juke-box’ principle, that is 48 disks were stored one above the other and an arm moving up and down the side of the file was able to interrogate any disk record within about half a second. 1964, etc. [see magnetic a. 1]. 1969Jrnl. Assoc. Computing Machinery XVI. 617 A multi-head disk is a disk with two or more recording heads, each of which is capable of independent movement. 1982What's New in Computing Nov. 12/4 Back up for the discs is provided on a tape streamer, tape cartridge or floppy. 1983Computers & Electronics Mar. 48 Most people who buy a moderately priced computer..will use cassette storage rather than disks. 1985P. Laurie Databases i. 34 Instead of the 20 milliseconds one expects of a medium sized Winchester, a laser disk may well take some 100-200 ms to write a record. 1986Times 20 May 30 Data is registered as changes in the reflectivity of the disc's surface; these are picked up from a low-power laser beam.
3. Anything resembling a circular plate.
a1711Grew (J.), The crystal of the eye, which in a fish is a ball, in any land animal is a disk or bowl. 1860Maury Phys. Geog. Sea iv. §265 About the Arctic disc, therefore, there should be a whirl. 1865Grote Plato II. xxiii. 169 Whether the earth was a disk or a sphere. 1872C. King Mountain. Sierra Nev. xi. 236 The whole great disc of world outspread. 1878Huxley Physiogr. xvi. 267 Multitudes of very minute saucer-shaped disks.
4. a. spec. The (apparently flat) surface or ‘face’ of the sun, the moon, or a planet, as it appears to the eye.
1664Phil. Trans. I. 3 He hath..at length seen them emerge out of his Disk. 1714Derham Astro-Theol. v. iv. (1726) 130 Jupiter..hath manifestly..his Belts and Spots, darker than the rest of his Disk. 1769W. Hirst in Phil. Trans. Abr. XII. 639 (title) Of several Phenomena observed during the Ingress of Venus into the Solar Disc. 1797Godwin Enquirer ii. xi. 364 The spots discoverable in the disk of the sun. 1834M. Somerville Connect. Phys. Sc. iv. (1849) 34 The eclipses [of the satellites] take place close to the disc of Jupiter. 1893Sir R. Ball Story of Sun 39 Mars at the time..shows a large and brilliant disk.
b. transf. Any round luminous (or coloured) flat surface; the surface of a flame or the like.
1758Reid tr. Macquer's Chym. I. 315 The surface of the Lead appearing..bright and shining like a luminous disc. 1855Longfellow Hiaw. viii. 101 [The sun-fish] Slowly rising through the water, Lifting his great disc of whiteness [v. v. disk refulgent]. c1860Faraday Forces Nat. 180 (Electric Light) If you look at the disc of light thrown by the apparatus. 1878Huxley Physiogr. xxi. 359 It presents the appearance of a luminous disc. 1881Daily Tel. 28 Jan., So long as the position of the disk which he is legally obliged to affix somewhere upon the vessel's side is left to the discretion of the owner.
5. Bot. A round and flattened part in a plant. spec.
a. A collection of tubular florets in the flower-head of Compositæ, forming either the whole head (as in the tansy), or the central part of it, as distinguished from the ray (as in the daisy).
b. An enlargement of the torus or receptacle of a flower, below or around the pistil. (In these senses always spelt disk.)
c. A disc-shaped marking or ‘bordered pit’ in the wood-cells of Gymnosperms, etc.
d. One of the disc-shaped adhesive bodies formed on the tendrils of the Virginia creeper and other plants.
e. The flat surface of a leaf, etc., as distinguished from the margin.
f. The disc-shaped hymenium of a discomycetous fungus; = discocarp (b).
[1706Phillips (ed. Kersey), Among Herbalists, Discus..the middle, plain, and flat part of some Flowers; because its Figure resembles the ancient Discus.] 1727Bailey vol. II., Disk, with Florists, is a Body of Florets collected together, and forming as it were a plain Surface. 1794Martyn Rousseau's Bot. vi. 65 In the radiate flowers the disk is often of one colour and the ray of another. 1807J. E. Smith Phys. Bot. 454 Polygamia frustranea, florets of the disk..perfect or united; those of the margin neuter, or destitute of pistils as well as of stamens. 1830Lindley Nat. Syst. Bot. Introd. 29 Immediately between the stamens and the ovarium is sometimes found a fleshy ring or fleshy glands called a Disk, and supposed..to represent an inner row of imperfectly developed stamens. 1870Hooker Stud. Flora 347 Coniferæ..wood-cells studded with disks. 1872Oliver Elem. Bot. ii. 195 In Daisy..the inner florets are much smaller, regular, tubular, and yellow, constituting the disk. 1875Darwin Insectiv. Pl. x. 246 The four leaves..with their tentacles pointing..to the two little masses of the phosphate on their discs. 1875Bennett & Dyer tr. Sachs' Bot. iii. iv. 781 Some tendrils, strikingly those of the Virginian creeper and Bignonia capreolata, have the..power of developing broad discs at the end of their branches..which attach themselves like cupping glasses to rough surfaces.
6. Zool. A roundish flattened part or structure in an animal body. spec.
a. In the animals formerly grouped as Radiata (Echinoderms, Cœlenterates, etc.): The central rounded and flattened part containing the oral opening and usually surrounded by rays, tentacles, or arms: from its resemblance to the disc and rays of a composite flower.
b. The set of feathers surrounding the eye of an owl.
c. The part of a bivalve shell between the margin and the umbo.
d. The most elevated portion of the thorax or elytra of an insect; the central portion of the wing.
e. The flat locomotive organ or ‘foot’ of a gastropod.
1761Gaertner in Phil. Trans. LII. 82 Out of the top part, or the disk of the polype, grow the feelers. 1834McMurtrie Cuv. Anim. Kingd. 272 Some of them..expand into a disk comparable to that of a flower or of an Actinia. 1847Carpenter Zool. §1015 In the Ophiuræ we find a more distinct central disk..it is furnished with arms. Ibid. §1013 In others the disk seems almost absent, the animal being, as it were, all rays. 1855Gosse Marine Zool. I. 41 Acalepha. Body in form of a circular disk, more or less convex and umbrella-like..moving by alternate contractions and expansions of the disk: Discophora [Sea-blubbers, etc.] Ibid. 63 Comatula. When adult, free, stemless, with simple thread-like jointed appendages around the dorsal disk. 1861J. R. Greene Man. Anim. Kingd., Cœlent. 132 The expanded Actinia..attaching itself by one of its flattened ends, known as the ‘base,’ a mouth being placed in the centre of the ‘disc,’ or opposite extremity. 1866Tate Brit. Mollusks iii. 46 The foot is a broad flat expanded disk. 1888Rolleston & Jackson Anim. Life 707 The mouth in the Phylactolaemata..lies in the centre of a disc, or lophophore, either circular or horse-shoe shaped, along the edges of which are arranged..a row of tentacles.
7. Anat. Applied to various round flat structures: spec.
a. The mass of fibrous cartilage lying between the bodies of adjacent vertebræ; slipped disc (see slipped ppl. a.).
b. The flattened corpuscles of the blood (blood-discs).
c. One of the flat circular bodies formed by the transverse cleavage of a muscular fibre; called specifically Bowman's discs.
d. optic disc: the round or oval spot where the optic nerve enters the eyeball. choked disc, a diseased condition of this, in which..the retinal veins are distended and tortuous (Syd. Soc. Lex.).
1845Todd & Bowman Phys. Anat. I. 60 Certain particles, the blood-discs, which float in it in great numbers. 1848Carpenter Anim. Phys. 35 In the blood of all the higher animals, we also find a vast number of minute discs, sometimes round, sometimes oval. 1859Todd Cycl. Anat. V. 41/1 Minute embryoes, scarcely longer than the blood discs of the frog. 1870Rolleston Anim. Life Introd. 43 All the other vertebræ have their centra articulated together by fibro-cartilaginous discs. Ibid. 5 The crocodiles [have] interarticular fibrocartilaginous discs. 1883Syd. Soc. Lex. s.v., Intermediate disks, the membrane of Krause, separating muscle fibre into compartments. 1887Ibid., Intervertebral discs, lenticular elastic masses interposed between, and of the same shape as, the bodies of two adjacent vertebræ through the spinal column.
8. attrib. and Comb.
a. Of or belonging to a disc, as disc-bud, disc-budding (see 6 a), disc-floret, disc-flower (see 5 a), disc-lobe.
b. Consisting, or having the form, of a disc, as disc brake (hence disc-braked adj.), disc-brooch, disc-crank, disc-micrometer.
c. Characterized by or furnished with a disc or discs, as disc-coupling, disc-cutter, disc-electrometer, disc-fan, disc-signal, disc-telegraph; also in the names of agricultural machines (orig. U.S.), as disc-cultivator, disc drill, disc-harrow, (hence as v. trans.), disc plough.
d. objective and obj. genitive, as disc-bearing adj., disc-worship.
e. parasynthetic, as disc-shaped adj.; also instrumental and similative, as disc-adjusting, disc-capped, disc-like adjs.
f. Special combs. disc area Aeronaut. (see quots.); disc-armature, an armature wound so that its coils lie in the form of a disc; disc-barrow, a flat circular barrow or tumulus; disc-clutch, a form of friction-clutch in which one revolving disc acts upon another; disc controller Computing, a device or system that controls the transfer of data to and from discs; disc drive Computing, a mechanism for rotating a disc; now spec. a storage device with one or more read/write heads and means for rotating a disc or disc pack; cf. tape drive s.v. tape n.1 4; disc-dynamo, a dynamo furnished with a disc-armature; disc electrode (see quot. a 1884); disc-engine, -steam-engine, a type of rotary engine in which the steam acts upon a revolving or oscillating disc; disc-jockey orig. U.S. slang, a person who selects and introduces gramophone records for transmission on radio or television; abbrev. D.J., dee-jay; also as v. intr.; hence disc-jockeying vbl. n.; disc loading Aeronaut. (see quots.); disc operating system, an operating system for a computer that uses discs; abbrev. DOS s.v. D III. 3; disc-owl, the barn-owl: so called from the completeness of the facial disc (see 6 b); disc pack Computing, a storage device consisting of an assembly of rigid magnetic discs mounted on a central spindle and with a removable protective cover; disc parking, a parking scheme for vehicles whereby each must display a disc on which is shown the time when the vehicle was parked; disc storage Computing, storage of data on a disc or discs; disc system, a computer system in which storage is on discs rather than tape, etc.; disc-valve, a valve formed by a circular disc with rotatory or reciprocating motion; disc-wheel, a kind of worm-wheel in which the spur-gear is driven by a spiral thread in the face of the disc.
1898Cycling 54 *Disc-adjusting bearings.
1919H. Shaw Text-Bk. Aeronaut. xi. 146 The propeller during rotation marks out a circular area which is known as the ‘*disc area’. 1962Gloss. Aeronaut. Terms (B.S.I.) v. 16 Disk area, the area of the circle described by the tips of the blades.
1895A. J. Evans in Folk-lore Mar. 15 Like the *disk-barrows it is surrounded by a ditch and bank.
1870Bentley Bot. 39 *Disc-bearing Woody Tissue is composed of those wood cells called Disc-bearing Wood-cells.
1904M. Maclean Mod. Electr. Pract. IV. 241 Electric *disc brake. ― This is a brake that is not very largely in use [on trams] in this country. 1928Flight 20 Dec. 1325/2 The multiple disc brake offers unlimited possibilities for having large braking surfaces. 1950Autocar 15 Dec. 1257 At the moment the disc brake, like most innovations, is more expensive than the system which it seems to supplant. 1964J. Griffiths Your Car x. 105 Disc Brakes. These are a comparatively recent development on popular cars... The modern type was developed on racing cars, but it originated with the brakes used for the landing wheels on large aircraft.
1959G. Freeman Jack would be Gentleman x. 221 Prosser with his *disc-braked car is able to leave his braking that little bit longer.
1937Burlington Mag. Feb. 99/1 The first Kentish jewelled *disc-brooches. 1958D. Whitelock Changing Currents in Anglo-Saxon Studies 21 Mr. Bruce-Mitford's article on the late Saxon disc-brooches.
1846Dana Zooph. iv. §54 The *disk-buds, like the lateral, probably proceed from one of the same lamellæ.
Ibid. iv. §53 In *disk-budding, a new mouth opens in the disk.
1928Daily Express 17 Aug. 2/7 The system of milk distribution by means of *disc-capped bottles.
1906Daily Chron. 14 Nov. 9/3 The enormously increased popularity of the multiple *disc or ‘plate’ clutches. 1909Westm. Gaz. 11 Feb. 4/2 A multiple disc-clutch.
1970AFIPS Conf. Proc. XXXVII. 564/1 A *disk controller can be blocked for a limited number of contiguous cycles. 1978Pract. Computing July–Aug. 55/3 A typical hardware configuration..will comprise a processor containing two Intel 8080s and a bit-sliced disc controller, 20K Bytes of memory, [etc.]. 1985Personal Computer World Feb. 183 (Advt.), Incorporating Xebec performance-proven disk controllers.
1888Lockwood's Dict. Mech. Engin., *Disc crank, or crank disc, or crank plate, a crank of circular outline in which the metal is so disposed that the varying motion of the connecting-rod is suitably balanced.
1894Irrigation Age Jan. 34/1, I have found one of the best tools that we have yet used to be the *disc cultivator.
1835Ure Philos. Manuf. 198 A toothed pinion..gives each *disc-cutter a quick rotatory motion on its centre.
1897Sears, Roebuck Catal. 159/3 The *disc drill when polished will cut through sod and trash. 1907L. H. Bailey Cycl. Amer. Agric. I. 207 The disc drill is also used very extensively in many sections of the country.
1952Electr. Engin. Aug. 747/1 In the small machine, the *disk drive is somewhat different. [1963: see disc pack below.] 1968Dataweek 24 Jan. 1/1 Direct Access Storage disk drives can also be added—at least two and not more than eight drives—connected as a subsystem to the central processor. 1971New Scientist 18 Mar. 614/2 Enhancements to the little System 3 computer were..announced, including..double-fast Dolphin disc-drives. 1983Computerworld 1 Aug. 6 An Apple Computer, Inc. Apple II+ computer with 48K bytes of memory, two diskdrives and an Apple language system.
a1884Knight Dict. Mech. Suppl., *Disk electrode,..an electrode for telegraphic instruments in which the connection is secured by the contact of the peripheries of two disks. 1884F. Krohn tr. Glaser de Cew's Magn. & Dyn.-electr. Mach. 104 A kind of voltaic battery in which only one metal was employed, the disk-electrodes of which were rendered active by polarisation.
1876Catal. Sci. App. S. Kens. §1422 Attracted *Disc Electrometer, with double micrometer screw.
1833Mechanics Mag. XVIII. 242 One of these half oscillatory, half revolving *disc engines. 1855Ibid. LXIII. 266 In 1849 disc engines..were employed with great success in the printing office of the Times.
1903Westm. Gaz. 9 Dec. 8/2 The air..is drawn out by a *disc-fan.
1872Oliver Elem. Bot. ii. 195 In Daisy, and many other plants with ray and *disk florets.
1870Hooker Stud. Flora 185 Asteroideæ..*Disk-flowers 2-sexual.
a1884Knight Dict. Mech. Suppl., *Disk harrow, a harrow..carrying a number of sharp-edged and concave disks. 1891R. Wallace Rural Econ. Austral. & N.Z. xix. 270 The Disc-Harrow..with its saucer-shaped discs strung on two axle-shafts. Ibid. xxii. 309 After the land has been disc-harrowed. 1907L. H. Bailey Cycl. Amer. Agric. I. 385 The revolving disc harrow or plow, with its concave discs moving obliquely through the soil. 1948British Birds XLI. 29 This area of waste ground had been disc harrowed a few days before. 1960Farmer & Stockbreeder 15 Mar. 98/1 A more recent development is the powered disc-harrow.
1941Variety 13 Aug. 36/3 Gilbert is a *disc-jockey who sings with his records. Ibid. 51 (headline) Art Green disc-jockeys from Manhattan Beach. 1942Time 6 July 67/1 Some stations merely hired ‘disk-jockeys’ to ride herd on swing records, in the traditional milk-man's matinee style. 1955Times 22 July 9/4 We will do well to try to emulate the disc-jockeys and to put into our voices the warm, gay humanity which they lavish on Mrs. Soup and Mrs. Gravel. 1971N.Y. Times (Entertainment section) 9 May 17/4 All the other disk jockeys had names like Brown and Green.
1941Variety 13 Aug. 36/3 (headline) *Disc-jockeying in Fifth Avenue window. 1955N. Fitzgerald House is Falling x. 164 I've had to take a spot of disc-jockeying on commercial programmes to make ends meet.
1893J. Tuckey tr. Hatschek's Amphioxus 137 A *disc-like thickening of the hypoblast. 1956Nature 11 Feb. 277/2 Red cells retain their disk-like form.
1934Jrnl. R. Aeronaut. Soc. XXXVIII. 508 (W/A) is the air column loading in lbs. per square foot of cross-section of the downwardly displaced column of air. In conformity with helical propeller practice this may be referred to as the *disc loading. 1962Gloss. Aeronaut. Terms (B.S.I.) v. 16 Disk loading, the thrust of the rotor divided by the disk area.
1870Hooker Stud. Flora 159 Cicuta..*Disk-lobes depressed, entire.
1783Herschel in Phil. Trans. Abr. XV. 325 (heading) A Description of the Dark and Lucid *Disc and Periphery Micrometers. 1802― in Phil. Trans. XCII. 214 To remove the disk-micrometer.
1967Data Processing Mag. Jan. 28/2 IBM split BOS into three distinct operating systems... The three new levels of operating systems were designated: *Disk Operating System (DOS) for users of the 16k-byte (minimum) disk-oriented systems; [etc.]. 1967Data-Processing Nov./Dec. 287 An advanced disc operating system developed by English Electric Computers for use with the System 4-50 computer. 1980R. Zaks CP/M Handbk. with MP/M v. 185 One of the primary functions of any disk operating system (DOS) is to provide effective and convenient management of disk-based files.
1963AFIPS Conf. Proc. XXIV. 327 (heading) A new high density recording system: the IBM 1311 Disk Storage Drive with interchangeable *disk packs. 1967D. G. Hays Introd. Computational Linguistics iii. 44 When information is moved to external storage but is intended for later use in the computer, only magnetic tape or a disc pack is truly suitable. 1971Science Jan. 28 How many magnetic drums or disc-packs are needed to hold 1012 bits? 1985Inmac Catal. Spring/Summer 21/1 Dust and impact are the two major problems you face when transporting data — both can cause dropouts on tapes, disk packs and cartridges.
1960Daily Tel. 2 Apr. 1/1 Provision of *disc parking on the lines of the system used in Paris. 1970Disc parking [see sense 2 f above].
1881U.S. Patent 9603, Disk plow. 1907Disc plow [see disc harrow above]. 1940Chambers's Techn. Dict. 251/2 Disc plough, a plough which cuts a furrow slice by means of a sharp-edged steel disc, of saucer-like shape, set obliquely to the ground surface.
1836–9Todd Cycl. Anat. II. 414/1 A *disc-shaped capsule. 1856Engineer 535/1 (Railway signals) The disc, a form in very general use.
Ibid. 535/2 *Disc signals. 1889G. Findlay Eng. Railway 69 The disc signal is used to indicate to a driver whose train is in a goods siding, when he may pass on to the main line.
1951J. A. Weidenhammer (title) Rabinow selective multiple magnetic *disk storage device. (IBM Technical Rep.) 1957Proc. 11th Western Joint Computer Conf. 44/1 The 60-word block of core storage serves as a static buffer for information transferred between the computer and tape, between computer and disk storage or between tape and disk storage under computer control. Ibid., Each disk storage unit has a capacity for six million numeric digits. 1984C. S. Parker Understanding Computers iii. 71 Disk storage was also introduced during the second generation, although its full potential was not realized until a generation later.
1966Computer Jrnl. IX. 242/1 Protection of a *disk system requires that no user be able to modify the system, purposely or inadvertently, thus preserving the integrity of the software. 1978Pract. Computing July–Aug. 33/2 The disc system is complete with controller, and disc operating system. 1984J. Hilton Choosing & using your Home Computer 11/1 You will also require a means of saving programs for future use. A cassette recorder or disk system are typical methods.
1874Knight Dict. Mech. I. 708/2 *Disk-telegraph, one in which the letters and figures are arranged around a circular plate and are brought consecutively to an opening, or otherwise specifically indicated.
1876R. Routledge Discov. 7 The position..assumed by the apparatus when the engine is in motion, the *disc-valve being partly open.
1883H. W. V. Stuart Egypt 365 Some Egyptologists assert that Amunoph III already had adopted *disk-worship from his Semitic wife.
Add: [c indigo][8.] [f.][/c] disc emulator Computing, a program that enables part of a memory to be used as if it were a disc.
1982Interface Age Nov. 102/1 With the Semidisk *disk emulator, Semidisk Systems..incorporates the 64K-bit memory chip into a half-Mbyte memory board that is configured to look like a disk drive.
disc file Computing, a file consisting of or stored on a disc or discs.
1961Instruments & Control Syst. XXXIV. 2063/1 *Disc files are becoming increasingly popular for data storage where access to large amounts of data is required in milliseconds. 1984Which Micro? Dec. 15 (Advt.), By creating special disc files..you can link..spreadsheets together.
Add: [c indigo][8.] [f.][/c] disc camera, a camera in which the image is formed on a disc rather than a roll of film.
1973D. A. Spencer Focal Dict. Photogr. Technol. 168 *Disc camera, high speed camera making records from cathode ray tubes as concentric traces on a disc of film rotating at up to 12,000 revs/sec. 1983Wall St. Jrnl. 5 Jan. 4/1 Despite gratifying sales of Kodak disk camera products and sharp increases in copier product revenue, overall Kodak results continue to be inhibited. 1991Photographer Aug. 10/2 Today's ISO 200 colour negative films were devised originally for disc cameras with a fixed exposure.
▪ II. disc, v. Chiefly U.S. and N.Z.|dɪsk|
Also disk.
[f. the n.]
To cultivate with a disc cultivator or disc harrow. So ˈdiscing vbl. n.; discing machine (see quot. a 1884).
a1884Knight Dict. Mech. Suppl., Disking machine,..a steam-cultivating implement to be drawn by an engine over sod or plowed sod. 1917Nat. Weather & Crop Bull. Mar. 4/2 Cutting corn-stalks, disking, and plowing have commenced. 1945B. MacDonald Egg & I (1946) iii. 45 When the garden..had been ploughed, disked, harrowed and dragged. 1950N.Z. Jrnl. Agric. Mar. 227/1 The soil should be disced and worked down to a fine tilth. Ibid. 314/1 Stalks should be ploughed or disced in..after the tobacco harvest. 1952M. H. Holcroft Dance of Seasons x. 75 After the ploughing came the discing, a confused and bumpy distribution of clods which marred the beauty of the furrows. 1960Farmer & Stockbreeder 15 Mar. 107/3 The amount of discing needed varies of course with the seasons. |