1. Mail that is registered by the post office when sent in order to assure safe delivery
   - registered post

Type of: mail

Encyclopedia: Registered mail

• Rhincodontidae
• Rhine
• Rhine River
• Rhine wine
• Rhineland
• rhinencephalon
• rhinestone
• rhinion
• rhinitis
• rhino
• Rhinobatidae
• rhinoceros
• Rhinoceros antiquitatis
• rhinoceros beetle
• rhinoceros family
• Rhinoceros unicornis
• Rhinocerotidae
• rhinolaryngologist
• rhinolaryngology
• rhinology
• Rhinolophidae
• Rhinonicteris
• Rhinonicteris aurantius
• rhinopathy
• rhinophyma