| TFR | total fertility rate; total flow resistance; transferrin receptor |
|---|---|
| SI | System of International Units (Systeme International D'unites) |
| BIPM | International Bureau of Weights and Measures [Fr. Bureau International des Poids et Mesures] |
| IAG | International Association of Gerontology; International Academy of Gnathology |
| IAP | immunosuppressive acidic protein; inosinic acid pyrophosphorylase; Institute of Animal Physiology; i... |
| ICSD | International Classification of Sleep Disorders |
|---|---|
| ICRU | International Commission of Radiation Units and Measurements |
| ICRP | International Commission of Radiological Protection |
| ICSH | International Committee for Standardisation in Haematology |
| ICRC | International Committee of the Red Cross |