transonic
adj 3
Definitions
adj
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.
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