Definition of "superfluidity" [superfluidity]

• The frictionless flow of a liquid at temperatures near absolute zero, especially that of liquid helium. (noun)

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• "Professor Reynolds who really excited my interest in superfluidity and low temperature physics."
• "The Russian physicist Pyotr Kapitsa later coined the analogous expression superfluidity to describe how liquid helium, at even lower temperatures, flows without internal friction or resistance."
• "It exhibits a property known as superfluidity, whereby atoms can flow across rough surfaces without ever slowing down."