/ Dictionary / Index P polio vaccine: Meaning and Definition of Find definitions for: po'lio vaccine" Pronunciation: [key] a vaccine administered to induce specific active immunity to poliomyelitis. Also calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. poliomyelitis poliovirus Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language