| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
|---|---|
| RR | radiation reaction; radiation response; rate ratio; rational recovery [group]; recovery room; relati... |
| RSA | rabbit serum albumin; regular spiking activity; relative specific activity; relative standard accura... |
| DICD | dispersion-induced circular dichroism |
| ECD | ectrodactyly; electrochemical detector; electron capture detector; endocardial cushion defect; enzym... |