/ Dictionary / Index A acetous: Meaning and Definition of Find definitions for: ac•e•tous Pronunciation: (as'i-tus, u-sē'-), [key] — adj. containing or producing acetic acid. sour; producing or resembling vinegar; vinegary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acetous (Thesaurus) acetostearin acetum Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language