| RFI | radiofrequency interference; recurrence-free interval; renal failure index |
|---|---|
| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
| SQUID | superconducting quantum interference device |
| ASHA | American School Health Association; American Social Health Association; American Speech and Hearing ... |
| CCP-SLP | Certificate of Clinical Competence in Speech Language Pathology |