creosolPronunciation: /ˈkriːəsɒl/Definition of creosol noun [mass noun] Chemistry a colourless liquid which 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 US English dictionary