nautiloid

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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World English Dictionary

nautiloid (ˈnɔːtɪˌlɔɪd)

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

—*adj*
2.	of, relating to, or belonging to the Nautiloidea

Collins English Dictionary - Complete & Unabridged 10th Edition
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Nautiloid is always a great word to know.

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a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

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American Heritage

Science Dictionary

nautiloid

(nôt'l-oid') Pronunciation Key
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.

Example sentences

While brachiopods, crinoids and nautiloid cephalopods declined.

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nautiloid

nau·ti·loid