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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 volt
electronegative
electronegativity
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electron optics
e·lec·tron op·tics


noun 
Definition:
 
study of electron beams: the science that deals with the direction, deflection, or focusing of beams of electrons by electric and magnetic fields, e.g. in electron lenses ( takes a singular verb )

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