\ 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
Test Your Vocabulary
Odd Habits and Quirks
-
- Which of the following best describes an easily irritated person?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share unio