| Abbreviation | Definition |
|---|---|
| HAAH | Human Aspartyl (Asparaginyl) Beta-Hydroxylase |
| HAEC | Human Artificial Episomal Chromosome |
| HAF | HCG (Human Chorionic Gonadotropin) Associated Factor |
| HAGR | Human Ageing Genomic Resources |
| HARD | Hyper Attachment - Reconstructional DNA |
| HASP | Hybernation After Super Production |
| HAT | Histone AcetylTransferase |
| HB | Human Being |
| HBGA | Human-Based Genetic Algorithm |
| HBGP | Honey Bee Genome Project |
| HCF | Host Controlled Factor |
| HCGA | Hybrid Chromosome Genetic Algorithm |
| HCGS | Hubbard Center for Genome Studies |
| HCK | Hemopoietic Cell Kinase |
| HCK | Tyrosine-protein kinase |
| HCT | Hematopoietic Cell Transplantation |
| HDCT | Heritable Disorder of Connective Tissue |
| HDR | homology-directed repair |
| HELSRD | Health Effects and Life Science Research Division |
| HENT | Human Equilibrative Nucleoside Transporter |