nautiloid

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nau·ti·loid

 (nôt′l-oid′)
n.
Any of various marine cephalopod mollusks formerly classified in the subclass Nautiloidea, including the nautiluses and numerous extinct species known only from fossils.

[From New Latin Nautiloīdea, former subclass name : Latin nautilus, nautilus; see nautilus + Greek -oeidēs, -oid.]

nau′ti·loid adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

nautiloid

(ˈnɔːtɪˌlɔɪd)
n
(Animals) any mollusc of the Nautiloidea, a group of cephalopods that includes the pearly nautilus and many extinct forms
adj
(Animals) of, relating to, or belonging to the Nautiloidea
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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