/ Dictionary / Index P photoelasticity: Meaning and Definition of Find definitions for: pho•to•e•las•tic•i•ty Pronunciation: (fō"tō-i-la-stis'i-tē, -ē"la-stis'-), [key] — n. Physics. the phenomenon of double refraction of polarized light by a transparent substance under elastic stress, used to measure strain in elastic, transparent materials. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photodynamics photoelectric Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language