topgallant
/ˌtɒpˈgælənt/noun
(亦作topgallant mast)
1- the section of a square-rigged sailing ship's mast immediately above the topmast上桅, 顶桅。
1.1
- （亦作topgallant sail）a sail set on such a mast上桅帆, 顶桅帆。