carinate

• 过时的形容词，意为有龙骨或脊状突起的，常用于动物学中描述鸟类的胸骨或贝壳的形状。

An obsolete adjective meaning having a keel or a ridge, typically used in zoology to describe a bird's sternum or a shell's shape.

1. Having a keel-like ridgeC2formal

   Describes something that has a ridge or a structure resembling the keel of a ship, often used in biology for certain shells or bones.

   具龙骨状突起的

   • The carinate shell of the mollusk is easily identifiable.
   • In ornithology, a carinate sternum is typical of flying birds.
   • The fossil showed a distinctly carinate structure along its midline.

   同义词carinatedkeeledridged

• 名词，指具有龙骨状突起的胸骨的鸟类，该突起为飞行肌肉提供附着点，是主动飞行所必需的。

A noun referring to birds that possess a keeled breastbone, which provides attachment for the flight muscles necessary for powered flight.

1. Keeled birdC2formalscientific

   A bird that has a keeled breastbone (sternum) for the attachment of strong flight muscles.

   突胸鸟

   • Most modern birds are carinates, capable of sustained flight.
   • The carinate's sternum is adapted for powerful wing strokes.
   • Paleontologists study the evolution of carinates from their ancestors.