Um·​bel·​lu·​la | \ ˌəmˈbelyələ \

Definition of Umbellula

: a genus (the type of the family Umbellulidae) of deep-sea alcyonarians consisting of a cluster of large flowerlike polyps at the summit of a long slender stem that stands upright in the mud and is supported by a bulbous base

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 Umbellula

New Latin, diminutive of umbella umbel

Keep scrolling for more

Learn More about Umbellula

Statistics for Umbellula

Cite this Entry

“Umbellula.” Dictionary, Merriam-Webster, Accessed 11 Jul. 2020.

Comments on Umbellula

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
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!