Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The phenolic carboxylic acid 3-(3,4-dihydroxyphenyl 2-propenoic acid that is an intermediate in the biosynthesis of lignin

from the GNU version of the Collaborative International Dictionary of English

  • adj. an acid obtained from coffee tannin, as a yellow crystalline substance, C9H8O4.

Etymologies

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