asphalt-base

adjective

: containing relatively large amounts of asphalt-forming substances : yielding asphaltic residues on refining

—used especially of crude petroleum compare naphthene-base, paraffin-base

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now