daggerboard / ˈdæg ərˌbɔrd, -ˌboʊrd /

📖毕业后词汇匕首板大刀板匕首牌匕首盘

daggerboard 的定义

n. 名词 noun

Nautical.

  1. a removable board on a small sailboat, typically of small dimension fore and aft, lowered into the water through a trunk to serve as a keel.