isophthalic acid

American

[ahy-suh-thal-ik, ahy-suh-] / ˈaɪ səˈθæl ɪk, ˌaɪ sə- /

noun

Chemistry.

a colorless, crystalline, slightly water-soluble solid, C 8 H 6 O 2 , the meta isomer of phthalic acid: used chiefly in the manufacture of resins and plasticizers.

First recorded in 1865–70; iso- + phthalic

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023