/ Dictionary / Index L lead arsenate: Meaning and Definition of Find definitions for: lead' ar'senate Pronunciation: (led), [key] — Chem. Chem. a white, crystalline, water-insoluble, highly poisonous powder, PbHAsO, used as an insecticide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lead acetate lead azide Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language