si·pho·ni·um
| \ sīˈfōnēəm \
plural siphonia\
-ēə
\
Definition of siphonium
: a bony tube in some birds connecting the tympanum with the air chambers of the articular piece of the mandible
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 siphonium