green acid

noun

: any of various mixtures of water-soluble sulfonic acid derivatives of petroleum obtained as by-products in treating white oils with sulfuric acid

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