| RR | radiation reaction; radiation response; rate ratio; rational recovery [group]; recovery room; relati... |
|---|---|
| RRR | regular rhythm and rate; renin release rate (or ratio) |
| SERT | sustained ethanol release tube |
| SIR | single isomorphous replacement; specific immune release; standardized incidence ratio; syndrome of i... |
| SOR | stimulus-organism response; superoxide release |