uvitonic

from The Century Dictionary.

• 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.

from the GNU version of the Collaborative International Dictionary of English.

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