nautiloid

noun
nau·​ti·​loid | \ ˈnȯ-tə-ˌlȯid How to pronounce nautiloid (audio) , ˈnä- \

Definition of nautiloid

: any of a subclass (Nautiloidea) of cephalopods bearing an external straight, curved, or spiral shell that were abundant chiefly in the Paleozoic but are represented in the recent fauna only by the nautiluses

Other Words from nautiloid

nautiloid adjective

Examples of nautiloid in a Sentence

Recent Examples on the Web Reefs built by microbes gave way to some of the first coral reefs, trilobites grew larger, and tentacled predators such as nautiloids diversified and swarmed the mostly fishless seas. Joshua Sokol, Science | AAAS, 18 Sep. 2019 Perhaps the smaller mosasaur caught the nautiloid, but was forced to give up its prey when a larger mosasaur approached. Brian Switek, WIRED, 11 Apr. 2012

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nautiloid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of nautiloid

circa 1728, in the meaning defined above

Learn More About nautiloid

Time Traveler for nautiloid

Time Traveler

The first known use of nautiloid was circa 1728

See more words from the same year

Dictionary Entries Near nautiloid

nautilite

nautiloid

Nautiloidea

See More Nearby Entries 

Statistics for nautiloid

Cite this Entry

“Nautiloid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nautiloid. Accessed 18 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on nautiloid

Britannica.com: Encyclopedia article about nautiloid

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!