Eph·​y·​da·​tia | \ ˌefəˈdāsh(ē)ə \

Definition of Ephydatia

: a common genus of freshwater encrusting sponges (family Spongillidae) often bright green from included symbiotic algae

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 Ephydatia

New Latin, from Greek, feminine of ephydatios of the water, in the water, from epi- + hydat-, hydōr water

Keep scrolling for more

Learn More about Ephydatia

Statistics for Ephydatia

Cite this Entry

“Ephydatia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Ephydatia. Accessed 7 Jul. 2020.

Comments on Ephydatia

What made you want to look up Ephydatia? 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

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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!