| 释义 |
toˈroidal, a. Geom.
[f. L. tor-us + -oidal.]
Resembling or pertaining to a torus (torus 4). Also = toric a.
1881Phil. Trans. R. Soc. CLXXII. 609 By ‘toroidal functions’ are understood functions which satisfy Laplace's equation and which are suitable for conditions given over the surface of tores. 1889Cent. Dict. s.v. Function, Toroidal function, a function serving to express the potential of an anchor-ring. 1895Scotsman 3 Dec. 4/6 Professor Tait made a communication on, ‘The application of net-work to a surface, in particular to a toroidal surface’. 1946[see poloidal a.]. 1948Electronic Engin. XX. 28 The problem..was solved by using a very few turns of concentrically wound copper tape and achieving the necessary self-inductance by winding on a high permeability toroidal core. 1962Corson & Lorrain Introd. Electromagn. Fields v. 200 (caption) Toroidal coil of square cross section carrying a current I. 1973Sci. Amer. Aug. 111/1 Optical surfaces are far from spherical these days; even our spectacle lenses are toroidal. 1975New Yorker 12 May 84/2 Wind instruments were bolted to a toroidal buoy.
Hence toˈroidally adv.
1961Technology Mar. 72/1 A variable-ratio toroidally-wound transformer. 1970Nature 26 Sept. 1299/1 Toroidally contained fusion plasmas. 1978Gramophone Aug. 396/3 To the right of the PCB is a massive, toroidally wound mains transformer. |