What does electrolysis mean?
Electrolysis is a noun referring to a process in which an electric current is driven through a substance — typically a liquid or molten compound that conducts ions — causing it to break down chemically into simpler substances. First named in the early nineteenth century during the pioneering experiments of Humphry Davy and later systematized by Michael Faraday, the technique remains fundamental to modern science and industry: it splits water into hydrogen and oxygen, extracts aluminium from bauxite ore, and refines copper. A second, quite different sense belongs to cosmetology, where electrolysis denotes the permanent removal of individual hairs by destroying their follicles with an electric current. Both senses share the same core idea of using electricity to effect change at a fine scale. The word carries a technical, scientific register, yet it appears regularly in news coverage of hydrogen fuel, renewable energy storage, and personal grooming.
The decomposition of a chemical compound, especially a liquid or molten one, by means of a direct electric current passed through it.
"Industrial electrolysis of molten alumina is how most of the world's aluminium is produced."
The destruction of hair follicles with an electric current in order to remove unwanted hair permanently.
"The clinic offers both laser treatment and electrolysis."
The plural follows the Greek-derived -is → -es pattern (like analyses). It is rare in general usage and appears mostly in technical or historical texts discussing multiple distinct processes.
"Faraday's laws apply equally to all these different electrolyses."
The word electrolysis was coined by Michael Faraday himself — the man who proved it worked — combining Greek roots for 'amber' (the ancient name for electric charge) and 'loosening.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of electrolysis
The word electrolysis was coined in English in the early nineteenth century from the Greek roots ēlektron ('amber', the classical source of the word electricity) and lysis ('loosening' or 'dissolving'), literally meaning 'loosening by electricity.' It emerged alongside related coinages such as electrode, ion, and anode as scientists of the era sought vocabulary for their new electrical experiments. Cognate formations with the same -lysis suffix appear throughout scientific English, including hydrolysis and paralysis.
Related word forms
How electrolysis is actually used
Register is neutral-to-formal; the word is technical in chemistry but ordinary in cosmetic contexts. The plural 'electrolyses' exists but is rare outside specialist writing. In everyday speech, context usually makes clear whether the scientific or the cosmetic sense is meant.
Easily confused with electrolysis
An electrolyte is the ionic substance that conducts electricity in solution or molten form, while electrolysis is the chemical decomposition caused by passing a current through it.
Electrolytic is an adjective describing processes or cells that use electrolysis, whereas electrolysis is the noun naming the process itself.
Laser hair removal uses concentrated light to target follicles, whereas electrolysis destroys each follicle individually with an electric current and is the only method recognized as permanent.