/ 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: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language