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\ ˈvan-də-ˌgraf- 
\
\Definition of Van de Graaff generator
: an apparatus for the production of electrical discharges at high voltage commonly consisting of an insulated hollow conducting sphere that accumulates in its interior the charge continuously conveyed from a source of direct current by an endless belt of flexible nonconducting material
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Van de Graaff generator
noun\ ˈvan-də-ˌgraf- \
\Medical Definition of Van de Graaff generator
: an apparatus for the production of electrical discharges at high voltage commonly consisting of an insulated hollow conducting sphere that accumulates in its interior the charge continuously conveyed from a source of direct current by an endless belt of flexible nonconducting material
— called also electrostatic generator
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The first known use of Van de Graaff generator was in 1937
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