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ester gum

noun, Chemistry
1.
any of several hard resins produced by the esterification of a natural resin, especially rosin, with a polyhydric alcohol, chiefly glycerol: used in the manufacture of paints, varnishes, and lacquers.
Origin
1935-1940
1935-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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