| 释义 |
gyration|dʒaɪəˈreɪʃən|
Also 8 giration.
[n. of action f. L. gȳrāre: see gyre v. Cf. F. giration.]
1. The action or process of gyrating; motion in a circle or spiral; revolution round a fixed centre or axis, turning round, wheeling or whirling; an instance of any of these.
1615Crooke Body of Man 457 If there had not beene these gyrations in the substance of the braine. 1646Sir T. Browne Pseud. Ep. ii. iv. 80 The ayre impelled returnes unto its place in a gyration or whirling. 1661Glanvill Van. Dogm. ix. 81 A French Top, throwne from a cord which was wound about it, will stand as it were fixt..and yet continue in its repeated Gyrations. 1704Newton Opticks i. (1721) 123 If a burning Coal be nimbly moved round in a Circle with Gyrations continually repeated. 1768–74Tucker Lt. Nat. (1834) I. 527 They might then make one giration in a long ellipsis. 1794Atwood in Phil. Trans. LXXXIV. 127 note, To place the centre of gyration nearly at the same distance from the axis. 1816Kirby & Sp. Entomol. (1843) II. 240 It performs its gyrations alternately from left to right and from right to left. 1834M. Somerville Connex. Phys. Sci. xv. (1849) 140 In the northern hemisphere the gyration [of the wind] is contrary to the movement of the hands of a watch. Ibid. 141 Beyond the actual circle of gyration or limits of the storm. 1860Maury Phys. Geog. Sea (Low) xix. §796 In the gyrations of the storm. 1872Daily News 25 Mar., Snowflakes that danced in eccentric fantastic gyrations. 1882Minchin Unipl. Kinemat. 110 M = mass of the whole body and k its radius of gyration about GH. 1897Ouida Massarenes xi, Women were nevertheless enchanted to be embraced by him in its [the waltz's] giddy gyrations.
b. with reference to immaterial things or fig.
1808J. Barlow Columb. ix. 440 The vast gyration of a thousand years. 1847Disraeli Tancred ii. xiv, His life was a gyration of energetic curiosity. 1852H. Rogers Ecl. Faith (1853) 35 Such is the appearance of Geo. Fellowes in that rapid gyration to which he has been subjected. 1868E. Edwards Ralegh I. ix. 146 His present effort was still more impeded by endless gyrations of irresolution. 1883S. Waddington A. H. Clough 83 The vortex of religious excitement..kept him idly moving in its ceaseless gyrations.
2. concr. in Conch. One of the whorls of a spiral univalve shell.
Hence gyˈrational a., characterized by gyration.
1889in Century Dict. (citing R. A. Proctor). |