/ Dictionary / Index A arsenite: Meaning and Definition of Find definitions for: ar•se•nite Pronunciation: (är'su-nīt"), [key] — n. Chem. a salt or ester of arsenous acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arsenious arseniuretted Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language