| RHD | radiological health data; relative hepatic dullness; renal hypertensive disease; rheumatic heart dis... |
|---|---|
| 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 | radical mastectomy; random migration; radon monitor; range of movement; red marrow; reference materi... |