a. (Naut.) Having the keel arched upwards, but not actually hogged; -- said of a ship. [ 1913 Webster ]
a. 1. (Bot.) Keel-shaped; having a longitudinal prominence on the back; as, a keeled leaf. [ 1913 Webster ]
2. (Zool.) Having a median ridge; carinate; as, a keeled scale. [ 1913 Webster ]