1
- the lengthwise timber or steel structure along the base of a ship, on which the framework of the whole is built up, in some vessels extended downwards as a blade or ridge to increase stability（船的）龙骨。
1.1
- Zoology a ridge along the breastbone of many birds to which the flight muscles are attached; the carina【动】龙骨突, 脊棱; 龙骨状的隆起; 隆线。
1.2
- Botany a prow-shaped pair of petals present in flowers of the pea family【植】龙骨瓣。
1.3
- poetic/literary a ship〈诗/文〉船。
no obj.(keel over)
1- (of a boat or ship) turn over on its side; capsize（船）翻倒; 倾覆。
1.1
- informal (of a person or thing) fall over; collapse〈非正式〉（人, 物）跌倒; 倒塌, 崩溃。
派生词
keeled
adjective一条深龙骨游艇
keelless
adjective词源
Middle English: from Old Norse kjọlr, of Germanic origin.