cetyl alcohol Syllabification: (ce·tyl al·co·hol)Pronunciation: /ˈsētl/Entry from US DictionaryDefinition of cetyl alcohol noun a waxy alcohol occurring in feces and esterified in spermaceti and wool wax. It is used in cosmetics and as an emulsifier. Chemical formula: CH3(CH2)15OH cetyl alcohol in other Oxford dictionaries Definition of cetyl alcohol in the US English dictionary