terephthalic acid

[ter-ef-thal-ik, ter-]
noun Chemistry.
a white, crystalline, water-insoluble solid, C 8 H 6 O 2 , the para isomer of phthalic acid: used chiefly in the manufacture of resins and textile fibers.

1855–60; tere(bic) + phthalic

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World English Dictionary
terephthalic acid (ˌtɛrɛfˈθælɪk)
a white crystalline water-insoluble carboxylic acid used in making polyester resins such as Terylene; 1,4-benzenedicarboxylic acid. Formula: C6H4(COOH)2
[C20: from terebene + phthalic acid]

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