Enter a clue or pattern or both:
The Clue
Freshwater mussel (4 letter answer)
The Answer
UNIO
Tags
Notes
The answer UNIO is seen occasionally, appearing about once every 850 puzzles.
Related Clues
Genus of mussels
Mussel genus
Mussel used by button makers
Definition
UNIO as a noun:
1. (Unio, genus Unio) = type genus of the family Unionidae