superfluid

American  

[soo-per-floo-id] / ˌsu pərˈflu ɪd /

noun

1. a fluid that exhibits frictionless flow, very high heat conductivity, and other unusual physical properties, helium below 2.186 K being the only known example.

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adjective

1. of or relating to a superfluid.

superfluid British  

/ ˌsuːpəˈfluːɪd /

noun

1. physics a fluid in a state characterized by a very low viscosity, high thermal conductivity, high capillarity, etc. The only known example is that of liquid helium at temperatures close to absolute zero

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adjective

1. being or relating to a superfluid

superfluid Scientific  

/ so̅o̅′pər-flo̅o̅′ĭd /

1. A fluid, such as liquid helium, that flows with little or no friction at temperatures close to absolute zero.

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Other Word Forms

• superfluidity
  noun

Etymology

Origin of superfluid

First recorded in 1940–45; super- + fluid

Example Sentences

See Examples For:

superfluid

By studying superfluid helium, a substance that displays unusual quantum behavior, scientists are uncovering patterns that could improve climate modeling, storm prediction, and aviation safety.

From Science Daily ● Jul. 5, 2026

The achievement represents the first successful demonstration of controlled molecular rotation inside a superfluid.

From Science Daily ● Jul. 4, 2026

When excitons were densely packed, they flowed freely as a superfluid.

From Science Daily ● Feb. 5, 2026

Until now, however, no experiment had clearly shown a superfluid naturally transforming into a supersolid.

From Science Daily ● Feb. 5, 2026

The B-L flux tube provides a structure for the PQ superfluid vortex's Chern-Simons coupling to attach to.

From Science Daily ● Dec. 7, 2025