Dixon Mann征：见Mann- Rickettsia
- Rickettsiaceae
- Rickettsiae
- rickettsiae
- rickettsial
- Rickettsiales
- rickettsialpox
- rickettsicidal
- Rickettsieae
- Rickettsiella
- rickettsiosis
- rickettsiostatic
- Ricolesia
- rictal
- rictus
- RID
- Riddoch's reflex
- Rideal-Walker coefficient
- ridge
- ridgel
- ridging
- ridgling
- Riedel's lobe,thyroiditis(disease,struma)
- Rieder's cell,cell leukemia,lymphocyte
- Riegel's pulse