R health terms
- Racoon sign
- Radioallergosorbent test
- Radiolucent
- Radionuclide
- Radiopaque
- Radium
- Ramsay Hunt syndrome
- Rathke's pouch
- RDW
- Reagent
- Rebound phenomenon
- Rebound tenderness
- Reciprocal translocation
- Recombinant DNA
- Rectal carcinoids
- Rectum
- Recumbent
- Recurrent
- Red
- Red sweat
- Renpenning's syndrome
- Reserpine
- Retention
- Reticulocyte
- Reticuloendothelial system
- Retina
- Retrotransposons
- Rett's syndrome
- Reverse pulsus paradoxus
- Reye's syndrome
- Rhinophyma
- Rhizome
- Rhodamine B
- Rhodopsin
- Riboflavin
- Ribosime
- Ribosomal RNA
- Ribosome
- RICE
- Rice-Tween agar
- Rod cells
- Rovsing sign
- Rub
- Rubor
- Ryanodine
- Ryanodine receptor
