Noun:

1. a sail (or either of a pair of sails) immediately above the lowermost sail of a mast and supported by a topmast

Topka托普卡topn.顶部；顶；上面；极点；陀螺adj.最高的；顶端的vt.形成顶部； 达到…的顶端； 处于…的最前头vi.总结； 超越； 高耸； 结束top-slide rest(上)滑动刀架top-level goal[计] 顶层目标Top Level School最高级学校topogeneous mire地形成因沼泽top sphere shaft上球轴top-hat policy额外人寿保险Topfer's reagent可控硅开关topological mode拓扑模式top cylinder cup上端气缸碗top-stem wheel立轮

gaff-topsailn.顶帆

fore-topsailn.前桅中桅的帆