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From The Collaborative International Dictionary of English v.0.48:
Uvitic \U*vit"ic\, a. [From L. uva a grape. So called because it may be produced indirectly from tartaric acid, which is found in the grape.] (Chem.) Pertaining to, or designating, an acid, CH3C6H3(CO2H)2, obtained as a white crystalline substance by the partial oxidation of mesitylene; -- called also mesitic acid. [1913 Webster]