hypersonic
SPEED THAT IS FASTER THAN MACH 5
Hypersonic flow; High-hypersonic speed regime; User:NimblyPimbly; Hypersonics; Hypersonic velocity; Hypersonic; Hypersound; Mach 10 (speed); Mach 6 (speed)
¦ adjective
1. relating to speeds of more than five times the speed of sound (Mach 5).
2. relating to sound frequencies above about a thousand million hertz.
Derivatives
hypersonically adverb