glycolPronunciation: /ˈglʌɪkɒl/Definition of glycol noun short for ethylene glycol. Chemistryanother term for diol.Derivatives glycolicPronunciation: /-ˈkɒlɪk/ adjective glycollicPronunciation: /-ˈkɒlɪk/ adjective Origin: mid 19th century (applied to ethylene glycol): from glycerine + -ol (originally intended to designate a substance intermediate between glycerine and alcohol)glycol in other Oxford dictionaries Definition of glycol in the US English dictionary