'inactive tartaric acid' definitions:

Definition of 'inactive tartaric acid'

From: GCIDE

mesotartaric \mes`o*tar*tar"ic\, a. [Meso- + tartaric.] (Chem.) Pertaining to, or designating, an acid called also {inactive tartaric acid}. It is an optically inactive stereoisomer of tartaric acid due to internal compensation of the rotatory activity of the two asymmetric centers; it has a plane of symmetry in the molecule. [1913 Webster +PJC]