a. Chem. [f. TRI- 5 + MES(ITYLENE + -IC.] In trimesic acid, C6H3(CO2H)3, symmetrical benzene-tricarboxylic acid. (So named by Fittig, 1867, when he obtained it from mesitylenic acid, and found it to be tribasic.)
1889. Roscoe & Schorlemmer, Chem., V. 138. Trimesic acid … crystallizes in hard, transparent, thick prisms, which melt above 300°.
