| Word | Definition |
|---|---|
| Raciology | Study of racial differences |
| Radiology | Study of x-rays and their medical applications |
| Reflexology | Study of reflexes |
| Rhabdology | Knowledge or learning concerning divining rods |
| Rhabdology | Art of calculating using numbering rods |
| Rheology | Science of the deformation or flow of matter |
| Rheumatology | Study of rheumatism |
| Rhinology | Study of the nose |
| Rhochrematics | Science of inventory management and the movement of products |
| Runology | Study of runes |