Encyclopedias, Almanacs, Transcripts, and Maps
- Retinitis Pigmentosa
- Retrograde Cystography
- Retrograde Cystography
- Retrograde Ureteropyelography
- Retrograde Urethrography
- Rett Disorder
- Rett Disorder
- Reward Deficiency Syndrome (RDS)
- Reye’s Syndrome
- Rh Blood Typing
- Rheumatoid Factor Testing
- Rhubarb Root
- Rhus Toxicodendron
- Riboflavin Deficiency
- Richter's Syndrome
- Right-Brain Hemisphere
- Riluzole
- Rinne and Weber Tests
- Rinne and Weber Tests
- Ritalin and Other Methylphenidates