Breadcrumb Home > Dictionary > Index N narceine: Meaning and Definition of Find definitions for: nar•ce•ine Pronunciation: (när'sē-ēn", -in), [key] — n. Pharm. a narcotic alkaloid, CHNO, occurring in opium and acting as a mild relaxant on smooth muscle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. narc narcissism TrendingHere are the facts and trivia that people are buzzing about. Animal Group Terminology Largest Countries in the World (by Area) Current Events This Week: January 2023 State Abbreviations Dinosaur Fossils (By U.S. State!) The Chinese Zodiac ✖ Related Content Daily Word Quiz: locution Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language