| BTA | Bladder tumor antigen |
|---|---|
| BTB | Blood-Testis Barrier |
| BTB | Blood-Tumour-Barrier |
| BTB | Breakthrough bleeding |
| BTB | bromothymol blue |
| BTC | Betacellulin |
| BTCP | 1,2]benzo(b)thiophenylcyclo-hexylpiperidine |
| btd | buttonhead |
| BTE | Behind The Ear |
| BTEX | benzene, toluene ethylbenzene and xylene |