'Trimesitic' definitions:

Definition of 'Trimesitic'

From: GCIDE

Trimesitic \Tri`me*sit"ic\, a. [Pref. tri- + mesitylene + -ic.] (Chem.) Of, pertaining to, or designating, a tribasic acid, C6H3.(CO2)3, of the aromatic series, obtained, by the oxidation of mesitylene, as a white crystalline substance. [Written also trimesic.] [1913 Webster]