Isocyanic /(?)/

I·so·cy·an·ic

Isocyanic

a.
  1. Designating an acid isomeric with cyanic acid. (Chem.)

Phrases & Compounds
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.