| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
|---|---|
| RIM | radioisotope medicine; recurrent induced malaria; relative-intensity measure |
| RIR | relative incidence rates; right interior rectus [muscle] |
| Rm | relative mobility; remission |
| RMA | rapid membrane assay; refuses medical advice; Registered Medical Assistant; relative medullary area;... |