1. A dark, sticky, bituminous substance found naturally or produced from petroleum; used in road construction and waterproofing.
Usage: Also called bitumen; more common in technical or historical contexts; Archaic or formal variant of 'asphalt'

Examples

• The ancient Romans used asphaltum-like materials to seal their aqueducts.
• Modern road construction relies on asphaltum mixed with aggregate stones.
• The waterproofing layer contained asphaltum to prevent moisture penetration.
• Asphaltum deposits were mined in the Middle East for thousands of years.
• The roofing material incorporated asphaltum for durability and weather resistance.