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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of three isomeric aromatic carboxylic acids, 3-(4-hydroxyphenyl)-2-propenoic acid, found in many plants

from the GNU version of the Collaborative International Dictionary of English

  • adj. one of a series of aromatic acids, related to cinnamic acid, the most important of which is a white crystalline substance, HO.C6H4.C2H2.CO2H, obtained from the tonka bean, sweet clover, etc., and also produced artificially.


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