SINCE 1828
dictionary
thesaurus

Phylloceras

noun
Save Word
Phyl·​loc·​er·​as | \ fə̇ˈläsərəs \

Definition of Phylloceras

: a genus (the type of the family Phylloceratidae) comprising smooth involute compressed ammonites with complex sutures that occur first in the Triassic and are believed to have been ancestral to most Jurassic and Cretaceous ammonites

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Phylloceras

New Latin Phyllocerat-, Phylloceras, from phyll- + -cerat-, -ceras -ceras

Learn More About Phylloceras

Dictionary Entries Near Phylloceras

Phyllocarida

Phylloceras

phylloceratid

See More Nearby Entries 

Statistics for Phylloceras

Cite this Entry

“Phylloceras.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Phylloceras. Accessed 3 Jul. 2022.

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

WORD OF THE DAY

teem

Listen to the pronunciation of teem

See Definitions and Examples »

Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
True or False

Test your knowledge - and maybe learn something along the way.

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!

Words at Play
Ask the Editors
Word Games