/ Dictionary / Index A arsenolite: Meaning and Definition of Find definitions for: ar•sen•o•lite Pronunciation: (är-sen'l-īt"), [key] — n. a mineral, arsenic trioxide, AsO, occurring usually as a white incrustation on arsenical ores. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arseno group arsenopyrite Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language