HYPERSONIC — Definition of HYPERSONIC

10 letters
adjective
1
(of a speed) equal to, or greater than, or capable of achieving, five times the speed of sound.
2
(of a speed) far enough above the speed of sound as to cause significant differences in behaviour due to chemical reactions or disassociation of the air.

📚 Source: en.wiktionary.org/wiki/hypersonic

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