1. Resembling iron rust in appearance or colour; brownish red, or yellowish red 
2. Partaking of iron; containing particles of iron

Encyclopedia: Ferruginous

• cyanic acid
• cyanide
• cyanide group
• cyanide poisoning
• cyanide process
• cyanide radical
• cyanine
• cyanine dye
• cyanite
• cyano group
• cyano radical
• cyano-
• cyanobacteria
• cyanobacterial
• Cyanocitta
• Cyanocitta cristata
• cyanocobalamin
• cyanogen
• cyanogenetic
• cyanogenic
• cyanohydrin
• Cyanophyceae
• Cyanophyta
• cyanophyte
• cyanosed