/ Dictionary / Index S spontaneous generation: Meaning and Definition of Find definitions for: sponta'neous genera'tion Pronunciation: [key] — Biol. Biol. abiogenesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spontaneous combustion spontoon Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language