| Acronym | Definition |
|---|
| ICRR➣Institute for Cosmic Ray Research (University of Tokyo) |
| ICRR➣Illinois Central Railroad |
| ICRR➣International Congress of Radiation Research |
| ICRR➣Israeli Committee for Right of Residency |
| ICRR➣Immigration Control and Refugee Recognition Act (1951; Ministry of Justice; Japan) |
| ICRR➣Inner Core Ring Road (elevated expressway project; India) |
| ICRR➣International Committee for Research in Reproduction (obstetrics and gynecology) |