Meaning of isocyanic acid

i'so•cy•an'ic ac'id

Pronunciation: (ī'sō-sī-an'ik, ī"sō-), [key]
— Chem. Chem.
  1. an unstable acid, CHNO, tautomeric with cyanic acid, known only in the form of its salts.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.