GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   -one (ōn). [From Gr. -ώνη, signifying, female descendant.] (Chem.) A suffix indicating that the substance, in the name of which it appears, is a ketone; as, “acetone”.
   
   [1913 Webster]
   
   
         
       

2.       
   -one suff. (Chem.) A termination indicating that the hydrocarbon to the name of which it is affixed belongs to the fourth series of hydrocarbons, or the third series of unsaturated hydrocarbons; as, nonone. [archaic]
   
   [1913 Webster +PJC]