BTBT
| Acronym | Definition |
|---|---|
| BTBT | Band-To-Band Tunneling |
| BTBT | Ballistic Tip Boat Tail (bullets; Nosler) |
| BTBT | Bro Time Best Time |
| BTBT | Baccalieu Trail Board of Trade (est. 1997; Newfoundland and Labrador, Canada) |
| BTBT | Beyond the Burning Time (Kathryn Lasky book) |