/ Dictionary / Index P Pascal's triangle: Meaning and Definition of Find definitions for: Pascal's' tri'angle Pronunciation: [key] — Math. Math. a triangular arrangement of the binomial coefficients of the expansion (x + y) for positive integral values of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pascal's theorem Pasch Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language