/ Dictionary / Index P ptomaine poisoning: Meaning and Definition of Find definitions for: pto'maine poi'soning Pronunciation: [key] (erroneously) food poisoning thought to be caused by ptomaine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ptomaine ptosis Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language