Letters that make Unio
o, n, i, u are letters that make 'Unio'
1 possible definitions for 'Unio'
Under this definition, unio is a noun and has the following properties:
genus Unio has the same meaning as Unio
'Unio' can be a type of mollusk genus.
'Unio' can be a member of Unionidae, family Unionidae.
pearly-shelled mussel is a member of Unio.