plural noun Pri·ono·des·ma·cea \ˌprīə(ˌ)nōˌdezˈmāsēə; prīˌänō-, prīˌōnō-\

Definition of Prionodesmacea

in some classifications

  1. :  a division of Lamellibranchia comprising comparatively primitive bivalve mollusks that typically have the hinge prionodont and being approximately equal to the combined orders Protobranchia and Filibranchia


noun or adjective


\-shəs\ adjective

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of prionodesmacea

New Latin, from prion- + desm- + -acea

Seen and Heard

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


feeling or affected by lethargy

Get Word of the Day daily email!