mizzenmast
noun
- the mast third from the bow in a ship with three or more masts
- the smaller, after mast in a ketch or yawl
See mizzenmast in American Heritage Dictionary 4
or miz·en·mast (mĭzˈən-məst, -măstˌ)
noun The third mast or the mast aft of a mainmast on a ship having three or more masts.