| RAIS | reflection-absorption infrared spectroscopy |
|---|---|
| REMAB | radiation-equivalent-manikin absorption |
| SAM | S-adenosyl-L-methionine; scanning acoustic microscope; senescence accelerated mouse; sex arousal mec... |
| SAR | scatter/air ratio; seasonal allergic rhinitis; sexual attitude reassessment; slowly adapting recepto... |
| SODAS | spheroidal oral drug absorption system |