a. Chem. Obs. [f. Thann (name of a town in the Vosges where Kestner the discoverer lived) + -IC.] In thannic acid: see quot.
1853. Pharmac. Jrnl., XIII. 110. Racemic acid was … discovered by Kestner,… in the year 1820. It was called thannic acid by its discoverer.
