nautili

nautilus

[nawt-l-uhs, not-]
noun, plural nautiluses, nautili [nawt-l-ahy, not-] , for 1, 2.
1.
Also called chambered nautilus, pearly nautilus. any cephalopod of the genus Nautilus, having a spiral, chambered shell with pearly septa.
3.
(initial capital letter) the first nuclear-powered submarine launched by the U.S. Navy.

Origin:
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

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World English Dictionary
nautilus (ˈnɔːtɪləs)
 
n , pl -luses, -li
1.  any cephalopod mollusc of the genus Nautilus, esp the pearly nautilus
2.  short for paper nautilus
 
[C17: via Latin from Greek nautilos sailor, from naus ship]

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Word Origin & History

nautilus
marine cephalopod, 1601, from L. nautilus, in Pliny a kind of marine snail (including also squid, cuttlefish, polyps, etc.), from Gk. nautilos, "paper nautilus," lit. "sailor," from nautes "sailor," from naus "ship" (see naval). The cephalopod was formerly thought to use its webbed arms as sails.
Online Etymology Dictionary, © 2010 Douglas Harper
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