Relating to or containing a complex salt of platinum and cyanide, especially in the lower oxidation state.
From cyano- (cyanide-related) + platinous (containing divalent platinum). The suffix -ous indicates lower oxidation state compared to -ic forms.
In chemistry, -ous and -ic suffixes are like version numbers for elements at different energy levels—cyanoplatinous is the 'version 2.0' with less oxidation than cyanoplatinite, letting chemists describe the exact type of compound in a single word.
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