| FRA | fibrinogen-related antigen; fluorescent rabies antibody |
|---|---|
| FRE | Fischer rat embryo; flow-related enhancement |
| GMRH | germinal matrix related hemorrhage |
| GRF | gastrin-releasing factor; genetically related macrophage factor; gonadotropin-releasing factor; grow... |
| GRID | gay-related immunodeficiency [syndrome] |