/ Dictionary / Index I indicial equation: Meaning and Definition of Find definitions for: indi'cial equa'tion Pronunciation: [key] — Math. Math. an equation that is obtained from a given linear differential equation and that indicates whether a solution in power series form exists for the differential equation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. indicial indicium Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language