Breadcrumb Home > Dictionary > Index P Cite ptomaine: Meaning and Definition of Find definitions for: pto•maine Pronunciation: (tō'mān, tō-mān'), [key] — n. any of a class of foul-smelling nitrogenous substances produced by bacteria during putrefaction of animal or plant protein: formerly thought to be toxic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ptomaine (Thesaurus) Ptolemy II ptomaine poisoning TrendingHere are the facts and trivia that people are buzzing about. April 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress Noble Titles and Ranks in a Monarchy Keeping Your Brain Active in a COVID-19 World Quetzalcoatl: Aztec Myths and Myths About the Aztecs Related Content Daily Word Quiz: supertonic Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language