dicyanide

from The Century Dictionary.

• noun The name of a class of compounds containing two cyanogen radicals, –CN, in the molecule.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A compound of a binary type containing two cyanogen groups or radicals; -- called also bicyanide.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry Any compound containing two cyanide ions or groups