The Collaborative International Dictionary of English v.0.48:

Electrolysis \E`lec*trol"y*sis\, n. [Electro- + Gr. ? a loosing,
   dissolving, fr. ? to loose, dissolve.] (Physics & Chem.)
   The act or process of chemical decomposition, by the action
   of electricity; as, the electrolysis of silver or nickel for
   plating; the electrolysis of water.
   [1913 Webster]

WordNet (r) 3.0 (2006):

electrolysis
    n 1: (chemistry) a chemical decomposition reaction produced by
         passing an electric current through a solution containing
         ions
    2: removing superfluous or unwanted hair by passing an electric
       current through the hair root

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "electrolysis":
   acetification, acidification, acidulation, alkalization, anion,
   bloodless surgery, carbonation, catalysis, cation, cauterization,
   cautery, chemicalization, electrocautery, electrocoating,
   electroetching, electrogalvanization, electrogilding,
   electrograving, electrolyte, electrolyzation, electroplating,
   electroresection, electrosurgery, ferment, fermentation,
   galvanization, hydrogenation, ion, ionization, ionogen, isomerism,
   laser surgery, metamerism, metamerization, nitration,
   nonelectrolyte, oxidation, oxidization, phosphatization,
   polymerism, polymerization, position isomerism, radiosurgery,
   reduction, saturization, surgery, surgical diathermy,
   surgical treatment, working