helium II

noun

1. liquid helium existing as a superfluid below the lambda point of 2.186 K, having very low viscosity and very high thermal conductivity.

Example Sentences

The Helium II Jacket is that little insurance policy for cloudy days, an ultra-light, ultra-packable garment designed for flash-storm protection.

From Forbes

Continuing his experiments at home, Kapitsa helped shed light on the extraordinary behavior of supercold helium�helium II�which acts as a perfect fluid, so lacking in viscosity that it will creep over the wall of a glass container.

From Time Magazine Archive

Two of the fundamental "laws" of physics are being outrageously violated in laboratories by a liquid, helium II.

From Time Magazine Archive

When two vessels filled with helium II at slightly different temperatures are connected by a fine tube, a heat-carrying current of liquid will flow into the cooler vessel almost as fast as it would drain off into an empty one.

From Time Magazine Archive