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coumarone resin

American

noun

any of the group of thermosetting resins derived by the polymerization of mixtures of coumarone and indene: used chiefly in the manufacture of paints, varnishes, and printing inks.

First recorded in 1895–1900

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