| Rb | Imp rubber base impression |
|---|---|
| SMB | selected mucosal biopsy; standard mineral base |
| TB | Taussig-Bind [syndrome]; terabyte; term birth; terminal bronchiole; terminal bronchus; thromboxane B... |
| TBAB | tryptose blood agar base |
| TBD | total body density; Toxicology Data Base |