An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

Of or pertaining to the speed of a body in a surrounding fluid when the relative speed of the fluid is → subsonic in some places and → supersonic in others.

→ trans-; → sonic.

Flow of a fluid over a body with a speed in the range just above and below the → Mach number 1.

→ transonic; → flow.