单词 | downfield |
释义 | downfieldadv.adj. A. adv. 1. Sport. a. American Football and Canadian Football. Towards the end zone which the offense is attacking; (with reference to certain rules) more than a certain distance beyond the line of scrimmage. ΚΠ 1881 St. Louis (Missouri) Globe-Democrat 31 Oct. 5/1 The Harvards won the toss and played down field, with a strong wind in their favor. 1922 P. D. Haughton Football & how to watch It i. 30 Watch the offensive ends begin their mad rush downfield at the snap of the ball. 1953 J. M. Tatum & W. K. Giese Coaching Football 69 This intricate fake allows the potential pass receivers to get down field..before the quarterback drops back to pass. 1990 Washington Post 9 Sept. c17/4 A second-quarter touchdown..was called back because of an ineligible player downfield. 2012 Sunday Capital (Annapolis, Maryland) 30 Sept. b4/3 Navy..moved the ball downfield in short order on the game's opening possession. b. In various sports: towards one end of the pitch or field, usually that nearest the goal which a given team or player is attacking. Cf. upfield adv. 1.downfield and upfield are sometimes contrasted, but when used on their own they usually have the same sense, although downfield is the more usual term. ΘΚΠ society > leisure > sport > place for sports or games > [adverb] > in or towards end of field downfield1885 1885 Dundee Courier & Argus 28 Dec. Play was commenced by the strangers putting the ball in motion, and they sent it well downfield, but Sandy returned it. 1907 North-China Herald 16 Aug. 402/1 In the second chukka a hit-off by Dixon was followed by a good run down-field by the Hongkong team. 1940 Dungog (New S. Wales) Chron. 28 May Muddle took play upfield, where Burgess secured and punted hard downfield. 1994 Economist 2 July 44/2 A soccer team full of ten-year-old boys, madly chasing the ball downfield. 2013 Fraser Coast (Queensland) Chron. (Nexis) 10 Apr. 36 The Capras worked it downfield then across the backline and scored in the corner to take a 4-0 lead. 2. Chemistry. At or to a position in an NMR spectrum corresponding to a higher nuclear resonant frequency than that of a reference peak. Contrasted with upfield adv. 2.In an NMR spectrum as typically displayed, such a position falls to the left of the reference. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [adverb] > towards lower field strength downfield1958 1958 Jrnl. Amer. Chem. Soc. 80 1767/2 Because of the electronegativity and the formal charge of N1, the 2- and 6-protons are shifted down field. 1990 Plant Physiol. 93 516/1 During recovery, as the intensity of the peak decreased, the resonance shifted downfield. 2010 Proc. National Acad. Sci. U.S.A. 107 12537/2 V2087 has one methyl group shifted upfield and one shifted downfield. B. adj. 1. Sport. a. American Football and Canadian Football. Directed towards the end zone which the offense is attacking; occurring beyond the line of scrimmage; (of an offensive player) engaged in action beyond the line of scrimmage. ΚΠ 1899 Denver Sunday Post 29 Oct. 3/1 A fine down-field run by Powers, who made a magnificent sprint of 107 yards, carrying the ball over Utah's goal. 1935 News-week 7 Dec. 28/3 Fans expected that the new ‘slow whistle’ would increase the use of down-field laterals. 1956 A. Danzig Hist. Amer. Football xiv. 365/2 The strong point of the team was the good blocking on the part of our downfield blockers. 1986 Los Angeles Times 26 Sept. iii. 1/1 The [New York] Giants don't scare you with their downfield speed or their offensive dazzle. 2002 Chicago Tribune (Midwest ed.) 15 Sept. iii. 9/5 He made a great downfield block to spring the running back for a 28-yard touchdown run. b. In various sports: directed towards or occurring near one end of the pitch or field, usually that nearest the goal which a given team or player is attacking; = upfield adj. 1. ΘΚΠ society > leisure > sport > place for sports or games > [adjective] > into or in part of field near goal attacked downfield1936 1936 Scotsman 13 Jan. 5/3 The Dundee defenders were lying too far upfield at the time. Another downfield punt beat them, and the visitors' centre ran down with the ball to score. 1975 Times 18 Dec. 8/7 A long downfield pass let Crisan run right in on Cruickshank and flick the ball past the desperately advancing goalkeeper for the equalizing goal. 1992 Pittsburgh Nov. 82/2 You're watching good polo when you see long downfield dribbles and ‘airshots’. 2017 Sunday Times (Nexis) 30 Apr. (Sport section) 10 Catching a downfield kick from Jackson, he aimed infield and slashed through the vulnerable visitors' middle, leaving three defenders..standing. 2. Chemistry. Of the displacement or position of a peak in an NMR spectrum: moving towards or occurring at a position that corresponds to a higher nuclear resonant frequency than that of a reference peak. Contrasted with upfield adj. 2. ΚΠ 1958 Tetrahedron 4 181 The down-field shift suffered by the 4-methyl group is relatively large and is almost certainly caused by the positive charge in the ion. 1971 Nature 17 Sept. 209/2 Downfield movements of the C19 (14 Hz) and C18 (5 Hz) protons were noted. 1990 Plant Physiol. 93 518/2 (caption) The upfield peak can only be seen as a shoulder on the downfield peak. 2006 J. M. Hornback Org. Chem. (Internat. Student ed.) xvi. 657 This downfield shift is a result of a ‘ring current’ that results from circulation of the pi electrons when the molecule is placed in the external magnetic field of the NMR instrument. This entry has been updated (OED Third Edition, December 2018; most recently modified version published online March 2022). < adv.adj.1881 |
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