(botany) the carina or keel of a papilionaceous flower

hedge euphorbia (Euphorbia antiquorum), a succulent plant used in traditional medicine and as a hedging shrub

A traditional Chinese wooden irrigation pump or waterwheel consisting of a wooden chain with paddles that move through a trough; it is powered by humans or animals and named for the chain's resemblance to a dragon's spine.

A wooden water wheel used for irrigation in agriculture. It consists of a long chain of paddles inside a trough that resemble a dragon's spine; can be powered by people, animals, or wind.