Breadcrumb Home > Dictionary > Index A autoignition point: Meaning and Definition of Find definitions for: autoigni'tion point" Pronunciation: [key] — Chem. Chem. the minimum temperature at which a substance will undergo spontaneous combustion. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. autoignition autoimmune ✖ Related Content Daily Word Quiz: musth Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language