plural noun (1), capitalized
cli·​on·​i·​dae | \ klīˈänəˌdē, -īˈōn- \

Definition of clionidae

 (Entry 1 of 2)

: a family (order Hadromerina) of small sponges with monaxon spicules that bore in shells and soft limestone rocks — see cliona


plural noun (2), capitalized
\ " \

Definition of clionidae (Entry 2 of 2)

: a family of naked pteropod mollusks comprising forms intermediate in many characters between typical pteropods and nudibranchs

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 clionidae

Plural noun (1)

New Latin, from Cliona, type genus + -idae

Plural noun (2)

New Latin, from Clione, type genus + -idae

Keep scrolling for more

Learn More about clionidae

Statistics for clionidae

Cite this Entry

“Clionidae.” Dictionary, Merriam-Webster, Accessed 23 Sep. 2020.

Comments on clionidae

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


Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

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!