/ Dictionary / Index L Lavoisier: Meaning and Definition of Find definitions for: La•voi•sier Pronunciation: (la-vwa-zyā'), [key] — n. 1743–94, French scientist: pioneer in the field of chemistry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lavoisier (Thesaurus) lavish law Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language