1. The mineral form of lead monoxide; in the form of yellow powder it is used as a pigment
   - massicot

Type of: lead ore

• Reykjavik
• Reynard
• Reynolds
• Rf
• RFD
• Rg
• Rh
• Rh antibody
• Rh factor
• Rh incompatibility
• rh-negative
• Rh-negative blood
• Rh-negative blood type
• rh-positive
• Rh-positive blood type
• rhabdom
• rhabdomancer
• rhabdomancy
• rhabdomyoma
• rhabdomyosarcoma
• rhabdosarcoma
• Rhabdoviridae
• rhabdovirus
• Rhadamanthus
• Rhaeto-Romance