oyster crab



a pea crab, Pinnotheres ostreum, the female of which lives as a commensal within the mantle cavity of oysters.

Nearby words

  1. oyster,
  2. oyster bay,
  3. oyster bed,
  4. oyster cap,
  5. oyster catcher,
  6. oyster cracker,
  7. oyster farm,
  8. oyster fork,
  9. oyster mushroom,
  10. oyster pink

Origin of oyster crab

First recorded in 1750–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for oyster crab

  • The oyster-crab is a true messmate, and its presence in the oyster may be advantageous in helping to provide food for its host.

    The Sea-beach at Ebb-tide|Augusta Foote Arnold

British Dictionary definitions for oyster crab

oyster crab


any of several small soft-bodied crabs of the genus Pinnotheres, esp P. ostreum, that live as commensals in the mantles of oysters
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012