| Abbreviation | Definition |
|---|---|
| BIP | bronchiolitis obliterans with usual interstitial pneumonitis |
| BIR | baculoviral IAP repeat |
| BIR | break-induced replication |
| BIR | British Institute of Radiology |
| BI-RADS | Breast Imaging Reporting & Data Systems |
| BIRD | Bolus vs Infusion Rescupase Development |
| BIRRU | benign idiopathic recurrent rectal ulceration |
| BIS | Barratt Impulsivity Scale |
| BIS | bioimpedance spectroscopy |
| BIS | Body Image Scale |
| BIS | Brain Information Service |
| BIS | Brain Injury Society |
| BIS | British Infection Society |
| BIS | budesonide inhalation suspension |
| BIS | building illness syndrome See Sick building syndrome |
| BIS | Business Intelligence System |
| BISH | Borderline isolated systolic hypertension |
| BIVDA | BIVDA British In Vitro Diagnostics Association |
| BKM | Bundle Key Milestone |
| BLAS | beta lactam antibiotic sensitivity |