| ADJECTIVE | all | transonic, sonic | (of speed) having or caused by speed approximately equal to that of sound in air at sea level |
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| Meaning | (of speed) having or caused by speed approximately equal to that of sound in air at sea level. | |
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| Synonym | sonic | |
| Opposite | subsonic | (of speed) less than that of sound in a designated medium |
| supersonic | (of speed) greater than the speed of sound in a given medium (especially air) | |
| Spanish | sónico, transónico | |
| Catalan | sònic | |
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