1. of, relating to, or containing iron
Usage: technical or formal; often used in chemistry and metallurgy
2. resembling or having the color of iron; dark gray or dull metallic
Usage: rare; literary

Examples

• The ferreous composition of the ore made it suitable for steel production.
• Ferreous minerals are commonly found in igneous rocks.
• The ferreous deposits in the region attracted mining companies.
• A ferreous hue characterized the ancient metal artifact.
• The soil's ferreous content contributed to its reddish appearance.