nautilus

[nawt-l-uh s, not-]
noun, plural nau·ti·lus·es, nau·ti·li [nawt-l-ahy, not-] /ˈnɔt lˌaɪ, ˈnɒt-/ for 1, 2.
  1. Also called chambered nautilus, pearly nautilus. any cephalopod of the genus Nautilus, having a spiral, chambered shell with pearly septa.
  2. paper nautilus.
  3. (initial capital letter) the first nuclear-powered submarine launched by the U.S. Navy.

Origin of nautilus

1595–1605; < Latin < Greek nautílos paper nautilus, literally, sailor, derivative of naûs ship; the webbed dorsal arms of the paper nautilus were thought to have been used as sails
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for nautili

nautilus

noun plural -luses or -li (-ˌlaɪ)
  1. any cephalopod mollusc of the genus Nautilus, esp the pearly nautilus
  2. short for paper nautilus

Word Origin for nautilus

C17: via Latin from Greek nautilos sailor, from naus ship
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for nautili

nautilus

n.

marine cephalopod, c.1600, from Latin nautilus, in Pliny a kind of marine snail (including also squid, cuttlefish, polyps, etc.), from Greek nautilos "paper nautilus," literally "sailor," from nautes "sailor," from naus "ship" (see naval). The cephalopod formerly was thought to use its webbed arms as sails.

Online Etymology Dictionary, © 2010 Douglas Harper