phenolsulfonephthalein

noun

variants or phenolsulfonphthalein

¦⸗ˌ⸗¦⸗ˌ⸗¦⸗(⸗)⸗

: a red crystalline compound C₁₉H₁₄O₅S formed by condensation of the anhydride of ortho-sulfobenzoic acid and phenol and used chiefly as a test of kidney function and as an acid-base indicator

called also phenol red

Word History

Etymology

International Scientific Vocabulary phenol + sulfonephthalein or sulfonphthalein

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