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Definition of Hypersonic
1. [adj]
Medical Definition of Hypersonic
1. Pertaining to or characterised by supersonic speeds of Mach 5 or greater. While any speed above the speed of sound may be referred to as supersonic, speeds of Mach 5 or greater are specifically referred to as hypersonic. Origin: hyper-+ L. Sonus, sound (05 Mar 2000)