/ Dictionary / Index E electron lens: Meaning and Definition of Find definitions for: elec'tron lens" Pronunciation: [key] a combination of static or varying electric and magnetic fields, used to focus streams of electrons in a manner similar to that of an optical lens. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. electronic tube electron microscope Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language