- a colorless, poisonous, flammable gas, N:CC:N
- the radical CN, occurring in cyanides
Origin of cyanogencyano- + -gen
- A colorless, flammable, pungent, highly poisonous gas, C2N2, used as a rocket propellant, an insecticide, and a chemical weapon.
- A univalent CN group found in simple and complex cyanide compounds.
(countable and uncountable, plural cyanogens)