noun. A colorless, flammable, pungent, highly poisonous gas, C₂N₂, used as a rocket propellant, an insecticide, and a chemical weapon.

noun. A univalent CN group found in simple and complex cyanide compounds.

noun. Chemical symbol Cy. A compound radical, CN, composed of one atom of nitrogen and one of carbon.

noun. A colorless, inflammable, poisonous gas, C2N2, with a peach-blossom odor, so called from its tendency to form blue compounds; obtained by heating ammonium oxalate, mercuric cyanide, etc. It is obtained in combination, forming an alkaline cyanide when nitrogen or a nitrogenous compound is strongly ignited with carbon and soda or potash. It conducts itself like a member of the halogen group of elements, and shows a tendency to form complex compounds. The name is also applied to the univalent radical, CN (the half molecule of cyanogen proper), which was one of the first compound radicals recognized.

noun. A colourless, poisonous gas used as a rocket propellant, an insecticide and in chemical warfare.

noun. The pseudohalogen (CN)2.

noun. The radical -CN.

noun. a colorless toxic gas with a pungent almond odor; has been used in chemical warfare

"A second commentator suggested it might have been a piece of a comet; comets often contain cyanogen, which at low levels could cause the symptoms described."

gas