| Abbreviation | Definition |
|---|---|
| RSGEMS(CFSAN) | Regulations and Special Government Employees Management Staff (CFSAN) |
| RSMB | Reporting Systems Monitoring Branch |
| RSMB(CDRH) | Reporting Systems Monitoring Branch (CDRH) |
| RSO | Radiation Safety Officer |
| RSS | RDF (Resource Data Framework) Site Summary |
| RSS | Really Simple Syndication |
| RSS | Regulatory Support Staff |
| RSS | Rich Site Summary |
| RSS(CDER) | Regulatory Support Staff (CDER) |
| RSV | respiratory syncytial virus |
| RSVIG | respiratory synctial virus immune globulin |
| RSVIGIV | respiratory synctial virus immune globulin intravenous |
| RSVP | Resource reporting System Via Projects |
| RTA | Refusal To Accept |
| RTAU | Review and Technical Assistance Unit |
| RTE | Ready-To-Eat |
| RTF | Refusal To File |
| RTF | Rich Text Format |
| RTL | Reproductive Toxicology Laboratory |
| RTL(NCTR) | Reproductive Toxicology Laboratory (NCTR) |