superfluid

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˌsuːpəˈfluːɪd/US:USA pronunciation: respellingUSA pronunciation: respelling(so̅o̅′pər flo̅o̅′id)


WordReference Random House Unabridged Dictionary of American English © 2026
su•per•flu•id  (so̅o̅′pər flo̅o̅′id),USA pronunciation [Physics.]
n. 
  1. Physicsa fluid that exhibits frictionless flow, very high heat conductivity, and other unusual physical properties, helium below 2.186 K being the only known example.

adj. 
  1. Physicsof or pertaining to a superfluid.
  • super- + fluid 1940–45
su′per•flu•id′i•ty, n. 

Collins Concise English Dictionary © HarperCollins Publishers::
superfluid /ˌsuːpəˈfluːɪd/ n
  1. 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
 adj
  1. being or relating to a superfluid

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