'Nonone' definitions:

Definition of 'Nonone'

From: GCIDE

Nonone \Non"one\, n. [Nonane + -one, suffix denoting the third degree of unsaturation.] (Chem.)
1. Any one of several metameric unsaturated hydrocarbons (C9H14) of the valylene series. [archaic?] [1913 Webster]
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. [PJC]