designating or of a process for converting electrical energy to high-pressure, mechanical shock waves by the discharge of a high-voltage arc under the surface of a liquid medium: used in metal shaping, breaking up rock, etc.
See electrohydraulic in American Heritage Dictionary 4
(ĭ-lĕkˌtrō-hī-drôˈlĭk)
adjective
Of, relating to, or involving a combination of electric and hydraulic mechanisms.