æsˈfɑl.təm

Definitions

1. noun

A type of bitumen, a sticky, black and highly viscous liquid or semi-solid form of petroleum, used in road construction and waterproofing.

“The ancient Romans used asphaltum to seal their ships and protect them from water damage.”

2. noun

A type of natural asphalt found in the province of Trinidad in South America.

“The natural asphaltum found in Trinidad was highly valued by the Spanish for its waterproofing properties.”