plural noun
Rhi·zos·to·mae | \rīˈzästəˌmē\

Definition of Rhizostomae 

: an order of Scyphozoa comprising jellyfishes that are related to the Semaeostomeae but are distinguished from them by fused oral lobes, by numerous small mouths replacing the primary mouth, and by the absence of tentacles and including various large jellyfishes that are dried and used as food in China and Japan

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 Rhizostomae

rhizostomatous \¦rīzə¦stōmətəs, -täm- \ adjective
rhizostome \ˈrīzəˌstōm \ noun plural -s
rhizostomous \(ˈ)rī¦zästəməs \ adjective

History and Etymology for Rhizostomae

New Latin, from Rhizostoma, genus of jellyfishes, from rhiz- + -stoma

Keep scrolling for more

Learn More about Rhizostomae

Share Rhizostomae

Statistics for Rhizostomae

Look-up Popularity

Comments on Rhizostomae

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


lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


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!