transcription, транскрипция: [ ˈvan-də-ˌgraf- ]
noun
Etymology: Robert J. Van de Graaff died 1967 American physicist
Date: 1937
: 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