Breadcrumb Home > Dictionary > Index N nautilus: Meaning and Definition of Find definitions for: nau•ti•lus Pronunciation: (nôt'l-us, not'-), [key] — pl. nau•ti•lus•es, nau•ti•li Also calledany cephalopod of the genus Nautilus, having a spiral, chambered shell with pearly septa. See (cap.) the first nuclear-powered submarine launched by the U.S. Navy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nautilus (Thesaurus) nautical mile nautophone TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: antipodes Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language