keel
英 [kiːl]
美[kil]
	    - vt. 给…装龙骨;把…翻转
 - n. 龙骨;平底船;龙骨脊
 - vi. 翻倒;倾覆
 - n. (Keel)人名;(德)克尔;(英)基尔
 
英英释意
- 1. the median ridge on the breastbone of birds that fly
 
- 2. one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability