ester gum
noun Chemistry.
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 of ester gum
First recorded in 1935–40
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019