Source : Webster's Revised Unabridged Dictionary (1913)

Cyanuric acid \Cyanuric acid\ (Chem.),
   an organic acid, {C3O3N3H3}, first obtained by heating uric
   acid or urea, and called {pyrouric acid}; afterwards obtained
   from {isocyanic acid}. It is a white crystalline substance,
   odorless and almost tasteless; -- called also {tricarbimide}.

Source : WordNet®

cyanuric acid
     n : a trimer of cyanic acid