UviticU*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.