/ Dictionary / Index P pinch effect: Meaning and Definition of Find definitions for: pinch' effect" Pronunciation: [key] — Physics. Physics. the tendency of an electric conductor or stream of charged particles to constrict, caused by the action of a magnetic field that is produced by a flow of electricity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pincheck pincher Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language