Definition of carinate in US English:



  • 1Having a keel-like ridge.

    • ‘The bluffs above the swamp are the only known home of the carinate pill snail, a species once thought extinct.’
    1. 1.1 (of a bird) having a deep ridge on the breastbone for the attachment of flight muscles.
      Contrasted with ratite
      • ‘Fossils of volant paleoganthous carinate birds from the Paleocene and Eocene appear phenetically most similar to tinamiform birds.’
      • ‘Penguins are flightless divers with poorly pneumatized skeleton, carinate sternum with two lateral notches, 15 cervical vertebrae and basipterygoid processes absent.’
      • ‘The story of Mesozoic birds became complicated by the discovery in 1985, by Russian colleague Evgeny Kurochkin, of Ambiortus, a Lower Cretaceous archaic but modern-type ornithurine (carinate) bird with an advanced flight apparatus.’


Late 18th century: from Latin carinatus ‘having a keel’, from carina ‘keel’.