1. Zoology. a structure or part having the form of a ridge or keel, such as the middle ridge on the breastbone of most birds.
2. Botany. the lower, keel-shaped pair of petals, characteristic of flowers of the pea family.
╂[< Latin carīna keel]
Ca|ri|na «kuh RY nuh», noun.
one of the four constellations into which the large southern constellation Argo has been divided; the Keel. It contains Canopus, a large, extremely bright star.
Useful english dictionary. 2012.