/ Dictionary / Index M magnetooptic: Meaning and Definition of Find definitions for: mag•ne•to•op•tic Pronunciation: (mag-nē"tō-op'tik), [key] — adj. pertaining to the effect of magnetism upon the propagation of light. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. magneton magnetooptics Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language