| 释义 |
circumvolution|ˌsɜːkəmvəʊˈl(j)uːʃən|
[n. of action, f. L. circumvolvĕre, cirumvolūt- to roll round. Cf. F. circonvolution 16th c. in Littré.]
1. Rolling, whirling, or turning round an axis or centre; revolution, rotation, gyration.
1447O. Bokenham Seyntys (1835) 144 Whan Phebus..Descendyd was..To þe lowest part by circumuolucyoun Of þe Zodyac. 1610Healey St. Aug. Citie of God xviii. viii, To behold the circumvolution of the starres. 1615G. Sandys Trav. iv. 307 Circe signifieth no other then the Suns circumuolution. 1635N. Carpenter Geog. Del. i. ii. 33 One Beame of the circle, by whose circumuolution is produced the circumference of it. 1751Johnson Rambler No. 102 ⁋12 Within the eddy.. where the circumvolution was weak. 1849M. Somerville Connect. Phys. Sc. §34. 371 The magnet tends to follow the circumvolution of the plate.
b. (with pl.) A single complete turn, revolution, or rotation.
1570Billingsley Euclid xi. 16. 317 A Cone is a regular body produced of one circumuolution of a rectangle triangle. 1641Wilkins Math. Magick ii. xv. (1648) 289 Every circumvolution voiding onely so much as is contained in one Helix. 1712Pope Spect. No. 408 ⁋1. 1853 G. Johnston Nat. Hist. E. Bord. I. 101 The number of circumvolutions is the true index to the time of day.
c. Of time, and fig.
1610Healey St. Aug. Citie of God xxi. 17. 858 That rotation and circumvolution of misery and blisse. 1863Heroes, Philos. & Courtiers Louis XVI, II. 57 During awful circumvolutions of endless Time.
2. The winding, rolling, or folding of a thing round something else.
b. A single fold or turn of anything so wound.
1599A. M. tr. Gabelhouer's Bk. Physicke 21/1 I..take my beginning of circumvolutione at the knees. 1634T. Johnson Parey's Chirurg. xiv. iv. (1678) 325 Binding..performed with many circumvolutions or wrappings about. 1713Derham Phys. Theol. x. i. 458 These Claspers taking hold of anything..at Hand..by a natural Circumvolution. 1856Ferrier Inst. Metaph. Introd. §51 Like a gigantic boa-constrictor..He may be breaking every bone in their body in his stringent circumvolutions.
3. A winding, or moving in a sinuous course; concr. a winding, a sinuosity. Also fig.
1633T. Adams Exp. 2 Pet. ii. (1865) 502 1 He that hath strayed into these thickets, will be so mazed with intricate circumvolutions, that, etc. 1742H. Baker Microsc. ii. xii. 143 The circular Wrinkles or Circumvolutions encompassing the [muscular] Fibres. 1750Johnson Rambler No. 65 ⁋3 A gentle river that..watered a large region with innumerable circumvolutions. 1844Disraeli Coningsby vi. ii. 230 Neither time nor temper for sentimental circumvolutions. 1868Duncan Insect World Introd. 9 A lengthened tubular organ..forming more or less numerous circumvolutions.
†b. Anat. (pl.) The convolutions of the surface of the brain. Obs.
1578Banister Hist. Man viii. 100 The circumuolutions and turninges in the brayne. 1713Cheselden Anat. iii. xiv. (1726) 242 Between the two hemispheres of the Cerebrum, lower than the circumvolutions.
c. Arch. (pl.)
1876Gwilt Archit. Gloss., Circumvolutions, the turns in the spiral of the Ionic capital, which are usually three, but there are four in the capitals of the temple of Minerva Polias. |