electrolysis Syllabification: (e·lec·trol·y·sis)Pronunciation: /ilekˈträləsis, ˌēlek-/Translate electrolysis | into Italian | into Spanish Definition of electrolysis noun 1 Chemistry chemical decomposition produced by passing an electric current through a liquid or solution containing ions. 2the removal of hair roots or small blemishes on the skin by the application of heat using an electric current. Derivatives electrolyticPronunciation: /iˌlektrəˈlitik/ adjective electrolyticalPronunciation: /iˌlektrəˈlitikəl/ adjective electrolyticallyPronunciation: /iˌlektrəˈlitik(ə)lē/ adverb electrolysis in other Oxford dictionaries Definition of electrolysis in the British & World English dictionary