su·​per·​flu·​id ˌsü-pər-ˈflü-əd How to pronounce superfluid (audio)
: an unusual state of matter noted only in liquid helium cooled to near absolute zero and characterized by apparently frictionless flow (as through fine holes)
superfluid adjective
superfluidity noun

Examples of superfluid in a Sentence

Recent Examples on the Web When a superfluid rotates, little whirlpools, or vortices, develop. Matthew Smith, Ars Technica, 8 July 2023 Both cold gases and neutron matter in some parts of a neutron star are superfluids—the particles flow without any friction. Matthew Smith, Ars Technica, 8 July 2023 So in the Allam cycle, the CO2 is compressed to a superfluid at around 8 MPa, cooled, and then efficiently pumped to 30 MPa. David Wagman, IEEE Spectrum, 30 May 2018 Researchers are cooling atomic systems to near absolute zero for use as quantum simulators to study applications in superconductors and superfluids. Andrea Gawrylewski, Scientific American, 23 Apr. 2020 Scientists describe it — and some ultracold gases, like BEC — as a superfluid. Stephen Ornes, Discover Magazine, 25 June 2019 But because of the strange physics of neutron stars, the protons and electrons become a superfluid and can maintain their motion without any electrical resistance. Paul Sutter, Ars Technica, 17 June 2022 In the case of helium, however, sufficient cooling will create a superfluid, at which point its atoms will flow without losing energy to viscosity. John Timmer, Ars Technica, 16 Mar. 2022 At temperatures above the point at which liquid helium becomes a superfluid, the transition created a broad peak instead of a sharp one. John Timmer, Ars Technica, 16 Mar. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'superfluid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1938, in the meaning defined above

Time Traveler
The first known use of superfluid was in 1938

Dictionary Entries Near superfluid

Cite this Entry

“Superfluid.” Dictionary, Merriam-Webster, Accessed 15 Apr. 2024.

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