suprathermal

“The figure illustrates a newly recognized phenomenon in the ACE SWEPAM suprathermal electron data – depletions of halo electrons centered on and roughly symmetric about 90° pitch angle PA relative to the heliospheric magnetic field.”

Up, Up and Away! Helium Balloon Telescope Explores the Sun | Universe Today

“What had not yet been shown, nor apparently considered, was that heavy molecules could be accelerated to suprathermal translational energies by expansion of a light carrier gas such as hydrogen or helium in which those heavy molecules were present a low levels.”

John B. Fenn - Autobiography

“A suprathermal ion detector to measure the mass and energy of any gases on or near the lunar surface.”

Space