| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
|---|---|
| RL | radial line; radiation laboratory; reduction level; renal dysplasia-limb defects [syndrome]; resisti... |
| RLP | radiation leukemia protection; ribosome-like particle |
| RML | radiation myeloid leukemia; regional medical library; right mediolateral; right middle lobe |
| RO | PACS radiation oncology picture archiving and communication system |