| Abbreviation | Definition |
|---|---|
| HRMA | High Resolution Melting Analysis |
| HSMB | High School Marine Biology |
| HTU | Hypothetical Taxonomic Unit |
| HUAEC | Human Umbilical Arterial Endothelial Cell |
| HVTQ | High Value Thymoquinone |
| HWBFI | Health Welfare Biomass Fuels Industry |
| HWE | Hardy-Weinberg equilibrium |
| HYSEC | Human Yolk Sac Endodermal Cell |
| IAB | Institute of Arctic Biology |
| IABD | International Academy of Biological Dentistry |
| IABS | International Alliance for Biological Standardization |
| IABT | Illinois Association of Biology Teachers |
| IABT | Indiana Association of Biology Teachers |
| IAHB | International Association of Human Biologists |
| IASB | International Association Synthetic Biology |
| IB | Institute of Biology |
| IBAM | Institute on the Biology of Aging and Metabolism |
| IBBA | Integrated Behavioral and Biological Assessment |
| IBBS | Integrated Biological and Behavioural Study |
| IBBS | Integrated Biological and Behavioural Surveys |