n.
A fluid, such as a liquid form of helium, exhibiting a frictionless flow at temperatures close to absolute zero.
superfluidity su'per·flu·id'i·ty (-flū-ĭd'ĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
