a. [ Pref. bi- + carinate. ] (Biol.) Having two keel-like projections, as the upper palea of grasses. [ 1913 Webster ]
‖n. pl. [ NL., Fem. pl. fr. L. carinatus. See Carinate. ] A grand division of birds, including all existing flying birds; -- So called from the carina or keel on the breastbone. [ 1913 Webster ]
a. [ Multi- + carinate. ] (Zool.) Many-keeled. [ 1913 Webster ]
a. [ Uni- + carinated. ] Having one ridge or keel. Craig. [ 1913 Webster ]