01 n. Any one of several metameric unsaturated hydrocarbons (C9H14) of the valylene series.
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1.
Any one of several metameric unsaturated hydrocarbons (C9H14) of the valylene series.(Chem.) [archaic?]
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2.
Any of several isomeric ketones (C9H18O) conceptually derived from nonane by substituting an oxygen for two hydrogen atoms on one of the non-terminal carbon atoms.