plural noun
Sphae·​ri·​idae | \ sfə̇ˈrīəˌdē\

Definition of Sphaeriidae

: a cosmopolitan family of minute freshwater bivalve mollusks (suborder Submytilacea) including some that are intermediate hosts of trematode worms — see sphaerium

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History and Etymology for Sphaeriidae

New Latin, from Sphaerium, type genus + -idae

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to corrupt or become corrupted

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