| RFW | rapid filling wave |
|---|---|
| RIS | radiology information system; rapid immunofluorescence staining; resonance ionization spectroscopy |
| RMA | rapid membrane assay; refuses medical advice; Registered Medical Assistant; relative medullary area;... |
| RME | rapid maxillary expansion; resting metabolic expenditure; right mediolateral episiotomy |
| RMM | rapid micromedia method |