/ Dictionary / Index L lead monoxide: Meaning and Definition of Find definitions for: lead' monox'ide Pronunciation: (led), [key] — Chem. Chem. litharge. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lead line lead-off 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