carinal
/ˈkɛrɪnəl/
adjective
- Relating to or shaped like a keel, especially the keel-like structure on the breastbone of birds or on certain plant parts.
- The carinal ridge on the bird's sternum helps anchor flight muscles.
- Botanists noted the carinal shape of the flower's lower petal.
- The fossil showed a clear carinal structure along the animal's chest.