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abietic acid

[ab-ee-et-ik, ab-] /ˈæb iˈɛt ɪk, ˌæb-/
noun, Chemistry
a yellow, crystalline, water-insoluble acid, C 20 H 30 O 2 , obtained from the resin of a species of pine: used chiefly in driers, varnishes, and soaps.
Also called sylvic acid.
1860-65; < Latin abiet- (stem of abiēs) fir + -ic Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for abietic acid

abietic acid

a yellowish powder occurring naturally as a constituent of rosin and used in lacquers, varnishes, and soap. Formula: C19H29COOH; melting pt: 173°C
Word Origin
C19: abietic, from Latin abiēt-, from abiēs silver fir (the acid originally being extracted from the resin)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for abietic acid

the most abundant of several closely related organic acids that constitute most of rosin, the solid portion of the oleoresin of coniferous trees. Commercial abietic acid is usually a glassy or partly crystalline, yellowish solid that melts at temperatures as low as 85 C (185 F). It belongs to the diterpene group of organic compounds (compounds derived from four isoprene units)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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