| Acronym | Definition |
|---|
| IRAB➣Infección Respiratoria Aguda Baja (Spanish: Acute Lower Respiratory Infection) |
| IRAB➣Imipenem-Resistant Acinetobacter Baumannii |
| IRAB➣Integrated Risk Assessment Branch (Office of Environmental Health Hazard Assessment; California) |
| IRAB➣Insulin Receptor Antibody |