jiggermast
/ˈdʒɪɡərˌmæst/
noun
- The fourth mast on a sailing ship with four or more masts, located behind the mizzenmast.
- The sailor climbed the rigging of the jiggermast to repair a torn sail.
- On a four-masted barque, the jiggermast is the smallest and farthest aft.
- The crew worked quickly to raise the sail on the jiggermast as the wind picked up.