/ Dictionary / Index P Pascal's law: Meaning and Definition of Find definitions for: Pascal's' law' Pronunciation: [key] — Physics. Physics. the law that an external pressure applied to a fluid in a closed vessel is uniformly transmitted throughout the fluid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pascal Pascal's limaçon 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