1. containing calcium carbonate or limestone; chalky
2. of, relating to, or resembling calcium or lime
Usage: geology, chemistry

Examples

• The cliffs along the coast are made of calcareous rock.
• Calcareous soil is common in Mediterranean regions.
• The shells of mollusks are composed of calcareous material.
• Limestone is a calcareous sedimentary rock.
• Plants that prefer acidic soil often struggle in calcareous environments.
• The calcareous deposits in the cave formed over thousands of years.