单词 | helix |
释义 | helixn. 1. Anything of a spiral or coiled form, whether in one plane (like a watch-spring), or advancing around an axis (like a corkscrew), but more usually applied to the latter; a coil, a spiral, as an electromagnetic coil of wire, the thread of a screw, a tendril, etc. In Geometry, the curve formed by a straight line traced on a plane when the plane is wrapped round a cylinder; more generally, a curve on any developable surface (e.g. a cone) which becomes a straight line when the surface is unrolled into a plane; distinguished from spiral, which is applied only to plane curves. ΘΚΠ the world > space > shape > curvature > coil > [noun] > a spiral > helix helix1643 spiral1670 1643 Sir T. Browne Religio Medici (authorized ed.) i. §17 The lives..of men..and the whole world, run not upon a Helix that still enlargeth, but on a Circle. View more context for this quotation 1664 H. Power Exper. Philos. i. 8 [The butterfly's tongue] being drawn up into an Helix, and retracted into the mouth. 1792 T. Taylor tr. Proclus Philos. & Math. Comm. (new ed.) I. 134 The helix..is described about a sphere or a cone. 1823 W. Henry Elements Exper. Chem. (ed. 9) I. v. 196 A copper wire, by being rolled round a solid rod, was twisted into a spiral so as to form a helix. 1837 D. Brewster Treat. Magnetism 156 An electro-magnetic helix enclosing a bar-magnet. 1854 J. Scoffern in Orr's Circle Sci., Chem. 195 Take a flat helix of..wire. c1860 M. Faraday Var. Forces Nature 189 Three wheels of magnets and two sets of helices. 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 866 The tendrils..form a spiral..or..a helix narrowing conically upwards. 2. Architecture, etc. A spiral ornament, a volute; spec. applied to the eight smaller volutes under the abacus of the Corinthian capital. ΘΚΠ society > leisure > the arts > visual arts > architecture > column > [noun] > capital > parts of specific types of capital caulis1563 helix1563 vase1563 voluta1563 cyllerie1592 codd1601 cilery1611 roll1611 turning1631 pillow1664 volute1696 tambour1706 collarino1715 annulet1728 colarin1728 drum1728 caulicoles1815 intervolute1831 bolster1842 stalk1842 horn1847 bell1848 cauliculusa1878 1563 J. Shute First Groundes Archit. D iij d Helices, the which..haue but halfe the height of the other great Helices, or Volutas. 1664 J. Evelyn Acct. Archit. in tr. R. Fréart Parallel Antient Archit. 128 At the extreams of these leaves do issue the Caules, and Codds breaking with the Helices. 1789 P. Smyth tr. H. Aldrich Archit. (1818) 98 The greater one, under the horn of the abacus, is called the volute; the smaller one, under the flower, the helix. 1857 S. Birch Hist. Anc. Pottery (1858) II. 5 The development of the helix or ornament of the antefixae is very remarkable. 3. Anatomy. The curved fold or prominence which forms the rim of the external ear. ΘΚΠ the world > life > the body > external parts of body > head > face > ear > [noun] > flap or lobe lapc1000 ear-lapOE list1530 lippet1598 lug1602 lappet1609 handle1615 libbet1627 auricle1650 flip-flop1661 pinna1682 helix1684 lobe1719 earlobea1785 ear flap1810 leaf1819 shell1831 pavilion1842 ear bud1953 1684 tr. S. Blankaart Physical Dict. 145 Helix,..the Exterior brim of the Ear, so called from its Winding. 1705 Philos. Trans. 1704–05 (Royal Soc.) 24 1979 The Prominence called Helix ends in the Lobe of the Ear, which it constitutes. 1873 Darwin in Life & Lett. III. 324–5 The leaf on one side looks just like the helix of a human ear. 4. Zoology. A genus of molluscs with spiral shells, of which the common snail ( Helix hortensis) is a typical example. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > order Pulmonifera > Inoperculata > family Helicidae > genus Helix helix1820 1820 W. Scoresby Acct. Arctic Regions I. 180 Helices, and other genera of Mollusca. 1830 C. Lyell Princ. Geol. I. 384 Terrestrial shells, chiefly helices. 1866 R. Tate Plain & Easy Acct. Mollusks Great Brit. iv. 94 The Helices do not live to a venerable age. This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022). < n.1563 |
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