unio

noun
\ˈyünēˌō\

Definition of unio 

1 capitalized : the type genus of the family Unionidae comprising freshwater mussels that have an oblong shell pearly within and covered without by a greenish or blackish epidermis

2 plural unios\ -​ōz\ or unionides\ ˌ⸗⸗ˈänəˌdēz\ : any mussel of Unio or a related genus

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Other Words from unio

unioid \ ˈ⸗⸗ˌȯid \ adjective

History and Etymology for unio

New Latin, from Latin, a large pearl

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