electron-optical cross-section
electron optics
electron orbit
electron orbital
electron oscillation tube
electron oscillator
electron pair bond
electron paramagnetic resonance
electron path
electron pencil
electron pendulum oscillation
electron period
electron plasma
electron pole
electron population
electron primary photoelectric current
electron-ray indicator tube
electron ray tube
electron recording (ER) tube
electron scanning
electron scanning microscope
electron scattering
electron screening
electron sharing
electron sheath
electron shell
electron spin resonance
electron spin resonance spectroscopy
electron stream transmission efficiency
electron switch = electronic switch