/ Dictionary / Index A autotoxin: Meaning and Definition of Find definitions for: au•to•tox•in Pronunciation: (ô"tu-tok'sin), [key] — n. Pathol. a toxin or poisonous chemical formed within the body and acting against it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. autotoxicosis autotransformer Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language