# Nobili's rings

> English word · Noun

## Definitions
1. Coloured rings formed upon a metal plate by the electrolytic disposition of copper, lead peroxide, etc. They may be produced by touching with a pointed zinc rod a silver plate on which is a solution of copper sulphate.

## Etymology
After Leopoldo Nobili, the Italian physicist who first described them in 1826.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/nobili-s-rings