toroidaladj.

1881 Philos. Trans. (Royal Soc.) 172 609 By ‘toroidal functions’ are understood functions which satisfy Laplace's equation and which are suitable for conditions given over the surface of tores.

1889 Cent. Dict. at Function Toroidal function, a function serving to express the potential of an anchor-ring.

1895 Scotsman 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 W. M. Elsasser in Physical Rev. 69 108/1 We shall now introduce names for these three types of vectors. They will be designated as scaloidal (U), toroidal (T), and poloidal (S) vector fields. The electric field and vector potential pertaining to a poloidal magnetic field are toroidal, and vice versa.

1948 Electronic Engin. 20 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.

1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields v. 200 (caption) Toroidal coil of square cross section carrying a current I.

1973 Sci. Amer. Aug. 111/1 Optical surfaces are far from spherical these days; even our spectacle lenses are toroidal.

1975 New Yorker 12 May 84/2 Wind instruments were bolted to a toroidal buoy.

1961 Technology Mar. 72/1 A variable-ratio toroidally-wound transformer.

1970 Nature 26 Sept. 1299/1 Toroidally contained fusion plasmas.

1978 Gramophone Aug. 396/3 To the right of the PCB is a massive, toroidally wound mains transformer.