| RCS | rabbit aorta-contracting substance; red cell suspension; reticulum cell sarcoma; right coronary sinu... |
|---|---|
| RDS | Raskin Depression Scale; respiratory distress syndrome; reticuloendothelial depressing substance; rh... |
| Rf | in paper or thin-layer chromatography, the distance that a spot of a substance has moved from the po... |
| RFLS | rheumatoid-factor-like substance |
| RPS | renal pressor substance; revolutions per second |