: a genus (the type of the family Pinnotheridae) of small crabs (as the oyster crab and the pea crab) having usually a thin membranous covering and living as commensals in the mantle cavity of various bivalve mollusks or in some similar cavity in other marine animals

Word History


New Latin, from Latin pinoteres, pinotheres crab living in the mantle cavity of the pen shell, from Greek pinotērēs, from pino- (from pinē pen shell) + -tērēs (from tērein to guard)

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 Pinnotheres

Cite this Entry

“Pinnotheres.” Dictionary, Merriam-Webster, Accessed 23 Jun. 2024.

Love words? Need even more definitions?

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