nautiloid

[ nawt-l-oid ]

/ ˈnɔt lˌɔɪd /

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noun

a mollusk of the subclass Nautiloidea, including nautiluses and many fossil species that were abundant in the Ordovician and Silurian periods.

adjective

noting or pertaining to a nautiloid.

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Words nearby nautiloid

nautch, Nautes, nautical, nautical day, nautical mile, nautiloid, nautilus, nautophone, NAV, Navaho, navaid

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use nautiloid in a sentence

Cephalic shield pointed behind; shell internal, chiefly membranous, with calcified nucleus, nautiloid; parapodia forming fins.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5|Various
The remarkable group of the Trilobites had precedence in order of time of the Nautiloid shell-fishes.
The Chain of Life in Geological Time|Sir J. William Dawson
He referred also to the nautiloid shell of the larva falling to one side.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5|Various

British Dictionary definitions for nautiloid

nautiloid

/ (ˈnɔːtɪˌlɔɪd) /

noun

any mollusc of the Nautiloidea, a group of cephalopods that includes the pearly nautilus and many extinct forms

adjective

of, relating to, or belonging to the Nautiloidea

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

Scientific definitions for nautiloid

nautiloid

[ nôt′l-oid′ ]

Any of various cephalopod mollusks of the subclass Nautiloidea, having a straight or coiled shell divided internally into a series of chambers of increasing size connected by a central tube. The nautiloids include the modern nautiluses as well as numerous extinct species dating back as far as the Cambrian Period.