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electromotive
electromotive force
electromyogram
electromyograph
electron
electron affinity
electron beam
electron gun
electron lens
electron micrograph
electron microscope
electron multiplier
electron optics
electron sea
electron shell
electron spin resonance
electron transport
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electron lens
e·lec·tron lens (plural e·lec·tron lens·es)


noun 
Definition:
 
device to control an electron beam: a device that creates an electric or magnetic field around the path of an electron beam so that the beam may be focused
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