/ Dictionary / Index D diophantine equation: Meaning and Definition of Find definitions for: di•o•phan'tine equa'tion Pronunciation: (dī"u-fan'tīn, -tēn, -fan'tn), [key] — Math. Math. an equation involving more than one variable in which the coefficients of the variables are integers and for which integral solutions are sought. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dioon diopside Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language