1. 
   Hypervelocity
   The term hypervelocity usually refers to a very high velocity, approximately over 3,000 meters per second (6,700 mph, 11,000 km/h, 10,000 ft/s, or Mach 8.8). In particular, it refers to velocities so high that the strength of materials upon impact is very small compared to inertial stresses. Thus, ...
   Found op http://en.wikipedia.org/wiki/Hypervelocity
   
   
2. 
   hypervelocity
   [n] - excessive velocity
   Found op http://www.webdictionary.co.uk/definition.php?query=hypervelocity
   
   
3. 
   Hypervelocity
   A range of speed that is about 12 times or more the speed of sound in air. See also: Hypersonic, Subsonic, Supersonic, Velocity.
   Found op http://www.diracdelta.co.uk/science/source/h/y/hypervelocity/source.html
   
   
4. 
   hypervelocity
   1) Excessive velocity 2) Speed 3) Velocity
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/hypervelocity/1
   
   

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