con·fi·den·tial 
(kŏn′fĭ-dĕnshəl)
(kŏn′fĭ-dĕnshəl)adj.
1. Done or communicated in confidence; secret.
2. Entrusted with the confidence of another: a confidential secretary.
3. Denoting confidence or intimacy: a confidential tone of voice.
4. Containing information, the unauthorized disclosure of which poses a threat to national security.
con′fi·den′ti·ali·ty (-shē-ălĭ-tē), con′fi·dential·ness n.
con′fi·dential·ly adv.
- radiosensitive
- radiosensitivity
- radiosonde
- radio spectrum
- radiosurgery
- radiotelegraph
- radiotelegraphic
- radiotelegraphy
- radiotelephone
- radiotelephonic
- radiotelephony
- radio telescope
- radiotherapist
- radiotherapy
- radiothermal
- radiotoxic
- radiotoxicity
- radiotracer
- radio wave
- radish
- Radisson
- radium
- radium therapy
- radius
- radius vector