electrophorus
noun
elec·troph·o·rus
i-ˌlek-ˈträ-fə-rəs
plural electrophori
i-ˌlek-ˈträ-fə-ˌrī
-ˌrē
: a device for producing electric charges consisting of a disk that is negatively electrified by friction and a metal plate that becomes charged by induction when placed on the disk
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Merriam-Webster unabridged
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