terephthalic acid

[ter-ef-thal-ik, ter-]

noun Chemistry.

a white, crystalline, water-insoluble solid, C8H6O2, the para isomer of phthalic acid: used chiefly in the manufacture of resins and textile fibers.

Origin of terephthalic acid

First recorded in 1855–60; tere(bic) + phthalic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for terephthalic acid

terephthalic acid


a white crystalline water-insoluble carboxylic acid used in making polyester resins such as Terylene; 1,4-benzenedicarboxylic acid. Formula: C 6 H 4 (COOH) 2

Word Origin for terephthalic acid

C20: from terebene + phthalic acid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012