mastheadcase
nounUK /ˈmɑːst.hɛd.keɪs/
US /ˈmæst.hɛd.keɪs/
A mastheadcase is a strong box that holds the top part of a ship's mast.
The sailor opened the mastheadcase to check the ropes inside.
OTHER MEANINGS
2. A protective cover for the top of a flagpole.
The flagpole's mastheadcase kept rain out of the pole.
3. A display case shaped like a ship's masthead.
The museum put the old compass in a mastheadcase.
4. A hard shell that protects a tall antenna's top.
The radio tower's mastheadcase shielded the sensor from wind.