Nobili's rings

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English[edit]

Etymology[edit]

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

Noun[edit]

Nobili's rings pl (plural only)

  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.
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