\I`so*cy*an"ic\, a. [Iso- + cyanic.] (Chem.)
Designating an acid isomeric with cyanic acid.

{Isocyanic acid}, an acid metameric with cyanic acid, and
   resembling it in its salts. It is obtained as a colorless,
   mobile, unstable liquid by the heating cyanuric acid.
   Called technically {carbimide}.