from the GNU version of the Collaborative International Dictionary of English

  • adj. Pertaining to, or designating, an acid which is obtained as a white crystalline substance by the action of ammonia on pyrotartaric acid.

from The Century Dictionary and Cyclopedia

  • Noting an acid, 2-methylpyridine-4, 6-dicarboxylic acid, a colorless compound, prepared by the action of ammonia on pyroracemic acid. It forms trimetric crystals and melts and decomposes at 274° C.


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