To save this word, you'll need to log in.
Definition of cannon pinion
: a small steel tube having at the lower end teeth that mesh with the teeth of the minute wheel of a timepiece and at the upper end the minute hand which is mounted on the arbor of the center wheel friction-tight so as to allow hand-setting
Test Your Vocabulary
Semantic Drift Quiz
- Which of the following was once a synonym for fun?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share cannon pinion