asphaltum
/ˈæsfɔltəm/
noun
- A dark, sticky, waterproof substance made from petroleum or natural deposits, used for paving roads and covering roofs.
- Asphaltum has been used for centuries to waterproof boats and buildings.
- The workers spread hot asphaltum over the driveway to seal it.
- The ancient Babylonians used asphaltum as mortar in their brick walls.