| 释义 |
screened, ppl. a.|skriːnd|
[f. screen v. + -ed1.]
1. a. Protected by a screen, sheltered. Also freq. with adverbs, as screened-in, screened-off.
1696Whiston Theory of Earth iv. iv. 355 In the more retired and skreen'd Plains and Valleys. 1833T. Hook Parson's Dau. iii. xi, A screened-off place was made up for the maids. 1872Browning Ring & Bk. ix. 567 Midnight meetings in a screened alcove Must argue folly in a matron. 1946J. O'Hara in New Yorker 6 July 18 Eben Townsend was sitting on the screened-in porch smoking his after-dinner cigar. 1968R. M. Patterson Finlay's River i. 39 We slept that night on the floor in the screened-in veranda, very comfortable and protected against the rain and the mosquitoes. 1973J. Wainwright Pride of Pigs 78 They led him..to the ward, and pointed out the screened-off bed. 1978P. Niesewand Underground Connection 1 The screened-off telephone switchboard. 1979Arizona Daily Star 5 Aug. (Advt. Section) 18/3 Enjoy the breezes and mountain views from large screened-in Arizona room. 1981P. Mallory Killing Matter iii. 33 A broad screened-in porch where Holly Devereaux sat in a rattan chair.
b. fig. Concealed, hidden away.
1844Queen's Regul. 123 The positive absence of Crime is the criterion of a well-established Discipline, not its screened existence.
c. Meteorol. Placed in or measured in a screen (see screen n.1 3 e).
1894Daily News 3 Jan. 5/4 Thirteen degrees of frost in the heart of London is a record which is not often obtained from a screened glass. 1920Westm. Gaz. 2 Dec. 6/4 At Greenwich, a minimum screened temperature of 27 deg. was registered.
2. a. Sifted by means of a screen.
1677J. W[orlidge] Art Gard. i. iii. 32 The Gravel Walkes..which if made with a fine skreened red Gravel do very much adorn your Garden. 1807A. Young Agric. Essex II. 193 He now does them [sc. the drains] with picked and skreened stone. 1838Civil Engin. & Arch. Jrnl. I. 341/2 A composition of ‘screened’ (otherwise almost uselessly small) coal, river mud, and tar. 1858Simmonds Dict. Trade, Screened-coal, sifted or large coal; that from which the breeze or fine dust has been separated.
b. In the sense of screen v. 4 c.
1957Economist 26 Oct. 321/1 A drive for Party members among discreetly screened intellectuals, who responded ‘sincerely’ to the ‘blooming-flowers’ campaign by seeing, hearing and speaking no evil, is also under way; the first 25 recruits are proudly announced from the professorial staff of Tientsin university. 1962L. Deighton Ipcress File xv. 86 The screened personnel available to us. 1967Times Rev. Industry July 89/3 The procedures of some 41 companies suggest that the higher the level of responsibility the less frequently a manager gains important external information from publications compared with other sources. But this may merely mean that information from publications is received in a screened form from other folk. 1979J. Gardner Nostradamus Traitor xlix. 242 The screened call came in from Washington.
3. Posted upon a screen. (See screen v. 5.)
1897Westm. Gaz. 12 May 4/3 Two are described in the screened list, as gentlemen.
4. a. Electr. Of a wire, circuit, or appliance; having a conducting cover or shield, intended to reduce the radiation or reception of interference.
1922Wireless World 1 July 416/2 A design for a screened oscillator was prepared. 1926S. O. Pearson Dict. Wireless Techn. Terms, Screened Aerial, an aerial beneath which is spread a network of wires to act as a counterpoise. 1927Amateur Wireless XI. 269/1 Following on these lines two practical forms of screened valve have been designed. Ibid. 269/3 The valve can then be built into a screened circuit,..if a slot is cut in the external screen. 1933Practical Wireless 4 Feb. 962/2 The ingenious screened wiring kit manufactured by Remax Radio is the very thing for temporary or permanent screening. 1936Ibid. 16 May 232/2 (heading) Screened leads. 1943Gloss. Terms Electr. Engin. (B.S.I.) 82 Screened cable, as used for electricity supply. A multicore cable in which the insulation of each conductor is separately enclosed in a conducting film in order to ensure a radial electric field surrounding the conductor, the films being in electrical connection with one another and with the metallic sheath of the cable and usually earthed. 1970J. Earl Tuners & Amplifiers vi. 134 Screened cable must be used on these low-level inputs to avoid excessive hum coupling.
†b. Electronics. screened grid: in a thermionic valve, a control grid having a screen grid around it. Usu. attrib. Obs.
1929Radio Times 8 Nov. 409 (Advt.), You could not get a better 3-valve set than the Brown Screened Grid Receiver. 1930Manch. Guardian 20 Sept. 15/7 Thanks to the screened-grid valve, the old monster multi-valve set is now practically a back number. 1943C. L. Boltz Basic Radio x. 164 The pentode has ousted the screened-grid valve from radio circuits.
5. Projected on a screen; shown at the cinema or on television.
1917C. N. Bennett Kinematography ix. 160 (heading) Distortion of the screened image. Ibid., [It] shows the normal proportions of the screened picture. 1966Listener 24 Nov. 775/3 Selectivity in exposure, perception, attention, retention, etc., means that the effect of screened violence will not be constant and will vary from person to person.
6. Printing. Of an image or surface: obtained with the aid of a screen (screen n.1 7); bearing a pattern formed by a screen.
1946H. Whetton Practical Printing & Binding xxv. 299/2 Type or pictures have now to be printed upon the screened tissue. 1952R. W. & E. W. Polk Practice of Printing (rev. ed.) xxxi. 232 (caption) Example of surprinting on 120-line screened background of varying densities. 1973M. Astrua Man. Colour Reproduction i. 106 For the preparation of screened positives or negatives, a study has been made of suitable screens. |