| Abbreviation | Definition |
|---|---|
| IPGRI | International Plant Genetic Resources Institute |
| IPSC | Induced Pluripotent Stem Cell |
| IPVN | ImmunoPeroxidase Virus Neutralization |
| ISAG | International Society for Animal Genetics |
| ISGP | Illinois Society of Genetic Professionals |
| ISH | In Situ Hybridization |
| ISMB | Intelligent Systems for Molecular Biology |
| ISONG | International Society of Nurses in Genetics |
| ISTR | Institute for Science Training and Research |
| ITAM | Immunoreceptor Tyrosine Activation Motif |
| ITFP | Integrated Transcription Factor Platform |
| ITK | Interleukin-2-inducible T-cell Kinase |
| ITP | Immune thrombocytopenic purpura |
| ITPC | International Tamoxifen Pharmacogenomics Consortium |
| ITPGR | International Treaty on plant genetic resources |
| ITSF | Immune Thymus Suppressor Factor |
| IUB | Institute for the Unborn Baby |
| IUBMB | International Union of Biochemistry and Molecular Biology |
| IUD | Intra-Uterine Device |
| IVC | Integral Viable Cells |