plural noun
Pen·​nat·​u·​la·​cea | \ pəˌnachəˈlāshēə \

Definition of Pennatulacea

: an order of Alcyonaria including the sea pens, sea pansies, and related forms that develop a colony which usually resembles a feather, leaf, or club, is often more or less bilaterally symmetrical with the polyps arranged along the distal part of a central axis or on lateral branches and has the basal end of the axis destitute of polyps and embedded in the mud of the sea bottom

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!

Other Words from Pennatulacea

pennatulacean \ ⸗¦⸗⸗¦lāshən \ adjective or noun
pennatulaceous \ -​shəs \ adjective

History and Etymology for Pennatulacea

New Latin, from Pennatula + -acea

Keep scrolling for more

Learn More about Pennatulacea

Statistics for Pennatulacea

Cite this Entry

“Pennatulacea.” Dictionary, Merriam-Webster, Accessed 15 Aug. 2020.

Comments on Pennatulacea

What made you want to look up Pennatulacea? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Name That Thing: Animal Edition

  • alt 5a023732e6f75
  • Name that animal:
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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