1. The sulphate of 4-methylaminophenol, used as a photographic developer

Encyclopedia: Metol

• Ribes rubrum
• Ribes sanguineum
• Ribes sativum
• Ribes uva-crispa
• ribgrass
• Ribhus
• ribier
• ribless
• riblike
• riboflavin
• ribonuclease
• ribonucleic acid
• ribonucleinase
• ribose
• ribosome
• ribwort
• Ricardo
• rice
• rice beer
• rice paddy
• rice paper
• rice rat
• rice weevil
• rice-grain fritillary
• ricebird