/ Dictionary / Index P partial differential equation: Meaning and Definition of Find definitions for: par'tial differen'tial equa'tion Pronunciation: [key] — Math. Math. a differential equation containing partial derivatives. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. partial differential partial fractions Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language