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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.

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. being or relating to a superfluid

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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.

Other Word Forms

  • superfluidity noun

Etymology

Origin of superfluid

First recorded in 1940–45; super- + fluid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Instead of freezing, it transforms from a normal gas into a superfluid, a rare state of matter that flows without any resistance and displays strange behaviors, including creeping up the sides of containers.

From Science Daily

Physicists have long wondered what would happen if a superfluid were cooled even further.

From Science Daily

They observed a superfluid, which typically remains in constant motion, suddenly stop moving.

From Science Daily

"For the first time, we've seen a superfluid undergo a phase transition to become what appears to be a supersolid," said Dean.

From Science Daily

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

From Science Daily

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.