/ Dictionary / Index E Eötvös experiment: Meaning and Definition of Find definitions for: Eöt'vös exper'iment Pronunciation: (ut'vush, et'- Hung. œt'vœsh), [key] — Physics. Physics. an experiment to confirm that all materials respond equally to gravity and that gravitational mass and inertial mass are equivalent. Cf. equivalence principle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. eosinophilic Eötvös torsion balance Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language