| REG | radiation exposure guide; radioencephalogram, radioencephalography |
|---|---|
| RPG | radiation protection guide; Report Program Generator[ PC language]; retrograde pyelogram; rheoplethy... |
| AL | Amyloid immunoglobulin Light chain protein |
| L & A | Light & Accommodation; 광선및 조절 |
| LASER | Light Amplication by Stimulated Emission of Radiation |