- radiolabeled
- radiologic exam
- radiologist
- radiology
- radionuclide
- radionuclide scanning
- radiopharmaceutical
- radiosensitization
- radiosensitizer
- radiosurgery
- radiotherapy
- radon
- Raftilose Synergy 1
- raloxifene
- raloxifene hydrochloride
- raltitrexed
- ramucirumab
- randomization
- randomized clinical trial
- ranpirnase
- Rapamune
- rapamycin
- rapid eye movement sleep
- rapid hormone cycling
- rapid-onset opioid
- Raptiva
- ras gene family
- ras peptide
- rasburicase
- rattlesnake root
- rauschpfeffer
- RAV12
- ravuconazole
- RBC
- reagent
- rebeccamycin
- rebeccamycin analog
- Recentin
- receptor
- recipient
- recombinant
- recombinant adenovirus-p53
- recombinant fowlpox-CEA-MUC-1-TRICOM vaccine
- recombinant fowlpox-TRICOM vaccine
- recombinant human interleukin-11
- recombinant human interleukin-2
- recombinant human methionyl stem cell factor
- recombinant interferon alfa-2b
- recombinant tissue plasminogen activator
- recombinant urate oxidase