hypersonic
/ˌhaɪpərˈsɑnɪk/
adjective
- Relating to speeds that are five or more times the speed of sound (Mach 5 or higher).
- Scientists are studying hypersonic aircraft that could one day fly from New York to Tokyo in under two hours.
- Hypersonic flight creates extreme heat that requires special materials to withstand.
- The military is developing hypersonic missiles that can travel faster than 3,800 miles per hour.
Antonyms