from the GNU version of the Collaborative International Dictionary of English

  • adj. Pertaining to, or derived from, an acid intermediate between glutaric and aconitic acids.

from The Century Dictionary and Cyclopedia

  • Noting a colorless compound, HOCO. CH2.CH:CH.COOH, which crystallizes in prisms and melts at 152° C. It is isomeric with itaconic,: citraconic, and mesaconic acids. Also called pentenediacid or A -G-propylenedi-carboxylic acid.


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