Persulphocyanogen

Per`sul`pho`cy`an´o`gen


n.1.(Chem.) An orange-yellow substance, produced by the action of chlorine or boiling dilute nitric acid and sulphocyanate of potassium; - called also pseudosulphocyanogen, perthiocyanogen, and formerly sulphocyanogen.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.