| RAM | random-access memory; rapid alternating movements; rectus abdominis muscle; rectus abdominis myocuta... |
|---|---|
| RAM-FAST | reduced acquisition matrix-Fourier acquired steady state |
| RISC | reduced-instruction-set computer |
| RUA | reduced under anesthesia |
| RVR | reduced vascular response; renal vascular resistance; repetitive ventricular response; resistance to... |