| BB | bad breath; bed bath; beta blockade, beta blocker; BioBreeding [rat]; blanket bath; blood bank; bloo... |
|---|---|
| SPF | skin protection factor; specific-pathogen free; spectrophotofluorometer; S-phase fraction; split pro... |
| SUN | standard unit of nomenclature; serum urea nitrogen |
| OBB | own bed bath |
| PB | British pharmacopeia [Pharmacopoeia Britannica]; paraffin bath; Paul-Bunnell [antibody]; periodic br... |