transonic
adjEtymology From tran- + sonic.
1
Just below, or just above, the speed of sound (0.8 < Ma < 1.2 approximately).
2
Passing from subsonic to supersonic, or vice versa.
3
Travelling through a fluid (commonly air) at a speed where regions of supersonic and subsonic flow coexist simultaneously over different portions of the surface of the moving object in question.
- Related terms
- transonically, transonics, sound barrier
- Coordinate terms
- plasmasonic, hypersonic, supersonic, subsonic