acetite: since acetate is used for nomenclature of a species (ion) with more oxygens, and acetite would be the same ion but with one less oxygen for example: sodium acetate (CH3COO- Na+ ) would be the species (ion) with more oxygens although it doesnt exist : sodium acetite (CH3CO- Na+) would be the species (ion) with less oxygens there are some acetite species that due exist (for example Ammonium acetite (CH3CO- NH4+) in generale , acetite refers to the CH3CO- ion in a species