Bituminous (adjective)

1. Relating to or containing bitumen.
2. Relating to or resembling coal of a type that has a higher volatile content and is softer and brighter than anthracite, and burns with a smoky flame.

Origin:

Late 17th century: from latin bituminosus, from bitumen "bitumen".

Examples:

1. The road was made of bituminous asphalt.
2. Bituminous coal is a type of coal that is commonly used for heating and electricity generation.
3. The bituminous rock was used to make the ancient Egyptians' mummies.
4. The bituminous paint was used to waterproof the roof.
5. The bituminous layer was used to seal the pond.