plural noun

: an extensive order of Anthozoa including most species that produce stony corals and that resemble the actiniarians in the general structure of the soft parts but that usually form colonies and always have an ectodermal calcareous skeleton
adjective or noun

Word History


New Latin, from Madrepora + -aria

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!

Dictionary Entries Near Madreporaria

Cite this Entry

“Madreporaria.” Dictionary, Merriam-Webster, Accessed 25 Jul. 2024.

Love words? Need even more definitions?

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