Definition of Nobili's ring
:one of the colored rings formed upon a metal plate by electrolytic deposition (as of copper or lead peroxide)
—usually used in plural
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Nobili's ring
noun
No·bi·li's ring
\
ˈnȯbəlēz-
,
ˈnōb-
\
From the M-W Editors
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Origin and Etymology of nobili's ring
after Leopoldo Nobili †1835 Italian physicist
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