| IBPMS | indirect blood pressure measuring system |
|---|---|
| IBQ | Illness Behavior Questionnaire |
| IBR | infectious bovine rhinotracheitis |
| IBRO | International Brain Research Organization |
| IBRV | infectious bovine rhinotracheitis virus |
| IBS | Irritable Bowel Syndrome |
| IBS | imidazole buffered saline; immunoblastic sarcoma; irritable bowel syndrome; isobaric solution |
| IBSA | iodinated bovine serum albumin |
| IBSN | infantile bilateral striated necrosis |
| IBSP | integrin-binding sialoprotein |