| BTBL | bromothymol blue lactose |
|---|---|
| BTS | blood transfusion service; blue toe syndrome; bradycardia-tachycardia syndrome |
| BTV | blue tongue virus |
| CBBM | color blindness, blue mono-cone-monochromatic type |
| CMB | carbolic methylene blue; Central Midwives' Board; chloromercuribenzoate |