hypersonic

== English == === Etymology === From hyper- +‎ sonic. Doublet of supersonic. === Pronunciation === === Adjective === hypersonic (comparative more hypersonic, superlative most hypersonic) (aviation) Of a speed, equal to, or greater than, or capable of achieving, five times the speed of sound. (aeronautics) Of a speed, far enough above the speed of sound as to cause significant differences in behaviour due to chemical reactions or dissociation of the air. ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === See also === scramjet === Anagrams === Honeycrisp