The process or state of having or forming a keel-like ridge or projection.
From 'carinate' plus the suffix '-ion', creating a noun that describes either the process of developing a keel-like structure or the state of having one.
The carination of a bird's breastbone is absolutely crucial for flight—without that keel developing properly during a bird's growth, it would never be able to generate enough muscle power to leave the ground.
Complete word intelligence in one call. Free tier — 50 lookups/day.