- supersonic (adj.)
[supersonic 词源字典]
- 1919, "of or having to do with sound waves beyond the limit of human hearing," from super- + sonic. Attested from 1934 in sense of "exceeding the speed of sound" (especially as a measure of aircraft speed), leaving the original sense to ultrasonic (1923).[supersonic etymology, supersonic origin, 英语词源]