multipolen.adj.

Brit.

/ˈmʌltɪpəʊl/, U.S.

/ˈməltiˌpoʊl/; see also multi- comb. form.

Origin: Formed within English, by compounding. Etymons: multi- comb. form, pole n.²

Etymology: < multi- comb. form + pole n.² Compare earlier dipole n.

A. n.

Physics. A system of 2^l monopoles (l = 1, 2, 3,…) with no net charge or pole strength and no moment of a lower order than l (cf. moment n. 8c).The dipole (l = 1) is often treated as a special case and the quadrupole (l = 2) regarded as the multipole of lowest order.In quot. 1916 this may not be the precise sense.

ΘΚΠ

the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [noun] > single charge or pole > system of

multipole1916

1916 Jrnl. Amer. Chem. Soc. 38 764 One or more electrons are held by sufficiently weak constraints so that they may..in the extreme case pass altogether to another atom, thus producing in the molecule a bipole or multipole of high electrical moment.

1930 Proc. Royal Soc. A. 128 591 The ordinary formula..amounts to taking the ‘dipole moment’ of the atom. A more exact treatment yields higher order terms as corrections, and these so-called ‘multipole’ terms..may allow transitions which are ‘forbidden’ by the ordinary selection rules.

1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields ii. 52 For the general multipole, characterized by the letter l, the potential varies as 1/r^l+1.

1972 McGraw-Hill Yearbk. Sci. & Technol. 1971 232/2 The only pieces of information that can penetrate the potential barrier and reach out from the black hole..are nonradiatable quantities: the electric monopole (the charge), the gravitational monopole (the mass), and a fixed combination of higher gravitational multipoles corresponding to the star's angular momentum.

2001 Optics Communications 190 13 The key step in this approach is to approximate the surface current densities by the lowest-order multipoles located in the complex plane.

B. adj.

1. Frequently in form multi-pole. Having several or many poles; (of a switch) designed to close or open several electrical circuits simultaneously.

ΚΠ

1927 Wireless World 22 June 786/3 It is sometimes recommended that a multi-pole switch should be fitted in order to switch off both batteries.

1934 Pract. Wireless 4 667/3 This multi-pole switch converts the usual panel-controlled push-pull action into a lateral movement.

1962 G. A. T. Burdett Automatic Control Handbk. iii. 24 The multi-pole type of control switch is a double break changeover switch especially designed for the switching of squirrel-cage motors.

1991 Design Engin. Aug. 60 (advt.) The finished magnet is robust and easily machined and is versatile in that it can be magnetised in many configurations, single or multipole.

2. Physics. Designating or relating to a multipole; esp. designating electromagnetic radiation of the kind produced by an electric multipole with a moment varying sinusoidally in magnitude.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [adjective] > relating to or occurring in a field

motional1879

multipole1929

poloidal1946

space-averaged1946

the world > matter > physics > electromagnetic radiation > electricity > circuit > circuit-breaker > [adjective]

multipole1929

the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [adjective] > relating to specific moments

quadrupole1922

quadripole1927

multipole1929

octopole1932

monopolar1948

sextupole1950

octupole1954

monopole1962

hexadecapole1969

1929 Physical Rev. 34 1252 Since m must change by ± 1,..the transition j = 0 → j = 0 cannot occur for multipole radiation.

1950 D. Halliday Introd. Nucl. Physics ii. 57 If |∆I| = 1 the multipole order is 2 and we have..a dipole transition; if |∆I| = 2, the multipole order is 4 and we have a quadrupole transition.

1952 J. M. Blatt & V. E. Weisskopf Theoret. Nucl. Physics xii. 586 The electric multipole fields have non-vanishing radial components of E, and the magnetic multipole fields have non-vanishing radial components of H.

1970 G. K. Woodgate Elem. Atomic Struct. ix. 166 The only multipole (2^k-pole) moments which do not vanish are: magnetic dipole (k = 1), electric quadrupole (k = 2), magnetic octupole (k = 3), electric hexadecapole (k = 4), etc.

1990 Q. Jrnl. Mech. & Appl. Math. 43 514 Each multipole potential g_nm(x, y) is a solution of Laplace's equation, except at the singular point (x, y) = (ξ_n, 0).

This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022).

单词	multipole
释义	multipolen.adj. Brit. /ˈmʌltɪpəʊl/, U.S. /ˈməltiˌpoʊl/; see also multi- comb. form. Origin: Formed within English, by compounding. Etymons: multi- comb. form, pole n.² Etymology: < multi- comb. form + pole n.² Compare earlier dipole n. A. n. Physics. A system of 2^l monopoles (l = 1, 2, 3,…) with no net charge or pole strength and no moment of a lower order than l (cf. moment n. 8c).The dipole (l = 1) is often treated as a special case and the quadrupole (l = 2) regarded as the multipole of lowest order.In quot. 1916 this may not be the precise sense. ΘΚΠ the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [noun] > single charge or pole > system of multipole1916 1916 Jrnl. Amer. Chem. Soc. 38 764 One or more electrons are held by sufficiently weak constraints so that they may..in the extreme case pass altogether to another atom, thus producing in the molecule a bipole or multipole of high electrical moment. 1930 Proc. Royal Soc. A. 128 591 The ordinary formula..amounts to taking the ‘dipole moment’ of the atom. A more exact treatment yields higher order terms as corrections, and these so-called ‘multipole’ terms..may allow transitions which are ‘forbidden’ by the ordinary selection rules. 1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields ii. 52 For the general multipole, characterized by the letter l, the potential varies as 1/r^l+1. 1972 McGraw-Hill Yearbk. Sci. & Technol. 1971 232/2 The only pieces of information that can penetrate the potential barrier and reach out from the black hole..are nonradiatable quantities: the electric monopole (the charge), the gravitational monopole (the mass), and a fixed combination of higher gravitational multipoles corresponding to the star's angular momentum. 2001 Optics Communications 190 13 The key step in this approach is to approximate the surface current densities by the lowest-order multipoles located in the complex plane. B. adj. 1. Frequently in form multi-pole. Having several or many poles; (of a switch) designed to close or open several electrical circuits simultaneously. ΚΠ 1927 Wireless World 22 June 786/3 It is sometimes recommended that a multi-pole switch should be fitted in order to switch off both batteries. 1934 Pract. Wireless 4 667/3 This multi-pole switch converts the usual panel-controlled push-pull action into a lateral movement. 1962 G. A. T. Burdett Automatic Control Handbk. iii. 24 The multi-pole type of control switch is a double break changeover switch especially designed for the switching of squirrel-cage motors. 1991 Design Engin. Aug. 60 (advt.) The finished magnet is robust and easily machined and is versatile in that it can be magnetised in many configurations, single or multipole. 2. Physics. Designating or relating to a multipole; esp. designating electromagnetic radiation of the kind produced by an electric multipole with a moment varying sinusoidally in magnitude. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [adjective] > relating to or occurring in a field motional1879 multipole1929 poloidal1946 space-averaged1946 the world > matter > physics > electromagnetic radiation > electricity > circuit > circuit-breaker > [adjective] multipole1929 the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [adjective] > relating to specific moments quadrupole1922 quadripole1927 multipole1929 octopole1932 monopolar1948 sextupole1950 octupole1954 monopole1962 hexadecapole1969 1929 Physical Rev. 34 1252 Since m must change by ± 1,..the transition j = 0 → j = 0 cannot occur for multipole radiation. 1950 D. Halliday Introd. Nucl. Physics ii. 57 If \|∆I\| = 1 the multipole order is 2 and we have..a dipole transition; if \|∆I\| = 2, the multipole order is 4 and we have a quadrupole transition. 1952 J. M. Blatt & V. E. Weisskopf Theoret. Nucl. Physics xii. 586 The electric multipole fields have non-vanishing radial components of E, and the magnetic multipole fields have non-vanishing radial components of H. 1970 G. K. Woodgate Elem. Atomic Struct. ix. 166 The only multipole (2^k-pole) moments which do not vanish are: magnetic dipole (k = 1), electric quadrupole (k = 2), magnetic octupole (k = 3), electric hexadecapole (k = 4), etc. 1990 Q. Jrnl. Mech. & Appl. Math. 43 514 Each multipole potential g_nm(x, y) is a solution of Laplace's equation, except at the singular point (x, y) = (ξ_n, 0). This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022). < n.adj.1916
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