superfluidityn.

Brit.

/ˌsuːpəfluːˈɪdᵻti/,

/ˌsjuːpəfluːˈɪdᵻti/, U.S.

/ˈˌsupərˌfluˈɪdədi/

Origin: Formed within English, by derivation. Etymons: super- prefix, fluidity n.

Etymology: < super- prefix + fluidity n. Compare superfluid n., superfluid adj.

Physics.

The property of flowing without viscosity or friction which, with other exceptional properties, is exhibited by the isotopes of liquid helium below certain temperatures; an analogous property of other collections of particles (as the electrons in a superconductor) that exhibit quantum effects on a macroscopic scale.

ΘΚΠ

the world > matter > physics > mechanics > dynamics > fluid dynamics > [noun] > superfluidity

superfluidity1938

the world > matter > physics > solid state physics > superconductivity > [noun] > unimpeded flow

superfluidity1976

1938 Physical Rev. 54 952/2 The transport properties..of liquid helium, when passing the λ-point actually change in a very conspicuous manner; thus one speaks of a ‘superfluidity’ and of a ‘super-heat-conductivity’.

1955 H. B. G. Casimir in W. Pauli Niels Bohr & Devel. Physics 131 The Bose-Einstein gas is the only model known at present that leads to macroscopic wave functions at finite temperatures and the super-fluidity of liquid helium has almost certainly something to do with this model.

1975 Rev. Mod. Physics 47 430/1 Observation of fourth sound [in ³He] proves the existence of superfluidity.

1976 Sci. Amer. Dec. 56/1 Under the name of superconductivity, superfluidity is also displayed by the conduction electrons in a great many metals and alloys.

2006 New Scientist 10 June 34/3 Stir a vat of superfluid and you'll produce an array of vortices: the superfluidity breaks down within each vortex, but everywhere else the fluid remains still.

This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).

单词	superfluidity
释义	superfluidityn. Brit. /ˌsuːpəfluːˈɪdᵻti/, /ˌsjuːpəfluːˈɪdᵻti/, U.S. /ˈˌsupərˌfluˈɪdədi/ Origin: Formed within English, by derivation. Etymons: super- prefix, fluidity n. Etymology: < super- prefix + fluidity n. Compare superfluid n., superfluid adj. Physics. The property of flowing without viscosity or friction which, with other exceptional properties, is exhibited by the isotopes of liquid helium below certain temperatures; an analogous property of other collections of particles (as the electrons in a superconductor) that exhibit quantum effects on a macroscopic scale. ΘΚΠ the world > matter > physics > mechanics > dynamics > fluid dynamics > [noun] > superfluidity superfluidity1938 the world > matter > physics > solid state physics > superconductivity > [noun] > unimpeded flow superfluidity1976 1938 Physical Rev. 54 952/2 The transport properties..of liquid helium, when passing the λ-point actually change in a very conspicuous manner; thus one speaks of a ‘superfluidity’ and of a ‘super-heat-conductivity’. 1955 H. B. G. Casimir in W. Pauli Niels Bohr & Devel. Physics 131 The Bose-Einstein gas is the only model known at present that leads to macroscopic wave functions at finite temperatures and the super-fluidity of liquid helium has almost certainly something to do with this model. 1975 Rev. Mod. Physics 47 430/1 Observation of fourth sound [in ³He] proves the existence of superfluidity. 1976 Sci. Amer. Dec. 56/1 Under the name of superconductivity, superfluidity is also displayed by the conduction electrons in a great many metals and alloys. 2006 New Scientist 10 June 34/3 Stir a vat of superfluid and you'll produce an array of vortices: the superfluidity breaks down within each vortex, but everywhere else the fluid remains still. This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022). < n.1938
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