hypersonic

[hahy-per-son-ik]
adjective
noting or pertaining to speed that is at least five times that of sound in the same medium.

Origin:
1935–40; hyper- + sonic

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To hypersonic
Collins
World English Dictionary
hypersonic (ˌhaɪpəˈsɒnɪk)
 
adj
concerned with or having a velocity of at least five times that of sound in the same medium under the same conditions
 
hyper'sonics
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
hypersonic  [%PREMIUM_LINK%]     (hī'pər-sŏn'ĭk)  Pronunciation Key 
Relating to or capable of speeds equal to or exceeding five times the speed of sound (Mach 5 and above). Compare subsonic, supersonic, transonic.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
The goal of the program is to produce an economically viable, environmentally comparable, quiet hypersonic airplane.
Their vast symmetrical shapes outline hypersonic shock waves produced by colliding shells of stellar gas.
Moving at hypersonic speeds, it compresses the gas violently, and the gas heats up.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature