They are initials and symbol of Cartoon Network, a specialized in entertainment cable channel. Symbol of a new chemical element recognized by the IUPAC, called atomic number 112 Copernicium. It was formerly named Unumbio (112). Occurred in the laboratory, it is very heavy and very short-lived. CN-(two letters and a script), in chemistry is the cyanide radical CN is the chemical formula for the functional group nitrile
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