| Acronym | Definition |
|---|
| MTSB➣Modified Trypticase Soy Broth (pathology) |
| MTSB➣Michael Tschechow Studio Berlin (Germany) |
| MTSB➣Massillon Tiger Swing Band (high school marching band; Massillon, OH) |
| MTSB➣Masscorp Trading Sdn. Bhd. (Kuala Lumpur, Malaysia) |
| MTSB➣Metropolitan Toronto School Board (Canada) |