I
| Name | Description | Related terms |
|---|---|---|
| IARC | International Agency for Research on Cancer | |
| ICRP | International Commission on Radiological Protection | |
| ICTV | International Committee on Taxonomy of Viruses | |
| id | intradermal | |
|
ID50 |
the 50 per cent infectious dose for viruses |
|
| IFST | Institute of Food Science and Technology (Europe) | |
| Ig | immunoglobulin | |
| IGR | insect growth regulator | |
| ILC | Industry Liaison Committee (of the APVMA) | |
| ILSA | International Life Sciences Institute | |
| im | intramuscular | |
| INN | international nonproprietary name (of a chemical) | |
| IOBC | International Organization for Biological Control | |
| ip | intra-peritoneal | |
| IPCS | International Programme on Chemical Safety (World Health Organization) | |
| IPM | integrated pest management | |
| IPPC | International Plant Protection Convention | |
| IPS | Information Publication Scheme | |
| IQ | installation qualification | |
| IR | infra-red | |
| IRIS | Integrated Risk Information System | |
| ISO | International Standards Organization (or International Organization for Standardization) | |
| ISTA | International Seed Testing Association | |
| IU | international units | |
| IUPAC | International Union of Pure and Applied Chemistry | |
| iv | intravenous |