| BAL | blood alcohol level; British anti-lewisite; bronchoalveolar lavage |
|---|---|
| BEL | blood ethanol level; bovine embryonic lung |
| BIL | basal insulin level; bilirubin |
| BOLD | bleomycin, Oncovin, lomustin, dacarbazine; blood oxygenation level dependent |
| BSL | benign symmetric lipomatosis; blood sugar level |