| IHRB | Industrial Health Research Board |
|---|---|
| ILAR | Institute of Laboratory Animal Research |
| IMR | individual medical record; infant mortality rate; infant mortality risk; Institute for Medical Resea... |
| INRIA | National Institute for Research in Computers and Automation [France] [Institut National de la Recher... |
| IRC | inspiratory reserve capacity; instantaneous resonance curve; International Red Cross; International ... |