| GRV | ground reaction vector |
|---|---|
| GSR | galvanic skin response; generalized Shwartzman reaction; glutathione reductase |
| GSSR | generalized Sanarelli-Shwartzman reaction |
| GVHR, GvHR | graft-versus-host reaction |
| HCR | heme-controlled repressor; host-cell reactivation; hysterical conversion reaction |