from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A derivative of cyclopentene having two hydroxyl groups and three carbonyl groups; its anion (croconate) is aromatic

from the GNU version of the Collaborative International Dictionary of English

  • adj. a yellow crystalline substance, C5O3(OH)2, obtained from potassium carboxide, rhodizonic acid, and various phenol and quinone derivatives of benzene, and forming yellow or orange colored salts.


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