The Collaborative International Dictionary
Paracyanogen
Paracyanogen \Par`a*cy*an"o*gen\, n. [Pref. para- + cyanogen.] (Chem.) A polymeric modification of cyanogen, obtained as a brown or black amorphous residue by heating mercuric cyanide.
Wiktionary
paracyanogen
n. (context chemistry English) A polymeric modification of cyanogen, obtained as a brown or black amorphous residue by heating mercuric cyanide.