/ Dictionary / Index P pasteurella: Meaning and Definition of Find definitions for: pas•teu•rel•la Pronunciation: (pas"tu-rel'u), [key] — pl. -rel•lae -rel•las. any of several rod-shaped bacteria of the genus Pasturella, certain species of which are parasitic and pathogenic for humans and animals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pasteur effect pasteurellosis Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language