creosol Syllabification: (cre·o·sol)Pronunciation: /ˈkrēəˌsôl, -ˌsōl/Definition of creosol noun Chemistry a colorless liquid that is the chief constituent of wood-tar creosote. Alternative name: 2-methoxy-4-methylphenol; chemical formula: C8H10O2 Origin: mid 19th century: from creosote + -olcreosol in other Oxford dictionaries Definition of creosol in the British & World English dictionary