| MBFLB | monaural bifrequency loudness balance |
|---|---|
| MDNB | mean daily nitrogen balance; metadinitrobenzene |
| MLB | micro-laryngobronchoscopy; monoaural loudness balance |
| SB | Bachelor of Science; Schwartz-Bartter [syndrome]; serum bilirubin; shortness of breath; sick bay; si... |