HYPERSONIC
Meaning of HYPERSONIC in English
/huy'peuhr son"ik/ , adj.
noting or pertaining to speed that is at least five times that of sound in the same medium.
[ 1935-40; HYPER- + SONIC ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012