a pea crab, Pinnotheres ostreum, the female of which lives as a commensal within the mantle cavity of oysters.
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Origin of oyster crab
First recorded in 1750–60
Words nearby oyster crab
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences 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
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