| Abbreviation | Definition |
|---|---|
| GTT | Glucose Tolerance Test |
| GUS | Glutaraldehyde User Station |
| GVG | Gamma Vinyl Gamma |
| H | Haploid |
| H | Hematachometer |
| H | mustard gas |
| H&E | Haematoxylin and eosin stain |
| H&E | Hematoxylin and Eosin |
| H&E | Hematoxylin and eosin stain |
| H&H | Hemoglobin and Hematocrit |
| H/H | Hematocrit and Hemoglobin |
| H1N1 | Hemagglutinin 1 Neurominidase 1 |
| HA | haemagglutinin |
| HAA | Hepatitis- Associated Antigen |
| HADL | Hematology Advanced Diagnostics Laboratory |
| HAI | haemagglutinin-inhibiting antibodies |
| HARCFL | Heart of America Regional Computer Forensics Laboratory (US Department of Justice) |
| HASL | Health And Safety Laboratory |
| HAT | Heparin Associated Thrombocytopenia |
| HAV | Hepatitis A virus |