superfluid

noun

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
ˌsü-pər-flü-ˈi-də-tē How to pronounce superfluid (audio)
noun

Examples of superfluid in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
When a superfluid rotates, little whirlpools, or vortices, develop. — Matthew Smith, Ars Technica, 8 July 2023 Scientists describe it — and some ultracold gases, like BEC — as a superfluid. — Stephen Ornes, Discover Magazine, 25 June 2019 These electrons form a frictionless superfluid inside the material. — Aamir Khollam, Interesting Engineering, 4 Feb. 2026 Another explanation might be that there's an exotic superfluid of fundamental particles deep in the pulsar's core. — Paul Sutter, Space.com, 28 July 2025 See All Example Sentences for superfluid

Word History

First Known Use

1938, in the meaning defined above

Time Traveler
The first known use of superfluid was in 1938

Rhymes for superfluid

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Browse Nearby Words

superfluent
superfluid
superfluity
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Cite this Entry

“Superfluid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/superfluid. Accessed 7 Jul. 2026.

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