/ Dictionary / Index L lidocaine: Meaning and Definition of Find definitions for: li•do•caine Pronunciation: (lī'du-kān"), [key] — n. Pharm. a synthetic crystalline powder, CHNO, used as a local anesthetic and also in the management of certain arrhythmias. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lidocaine (Thesaurus) lido lie 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