Meaning of electro-discharge machining

elec'tro-dis'charge machin"ing

Pronunciation: (i-lek'trō-dis'chärj), [key]
— Metall. Metall.
  1. a technique for shaping the surfaces of a metal object by immersing in a dielectric liquid the object and a tool that emits an electric discharge of high current density and short duration.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.