pinnation
/pɪˈneɪʃən/
noun
- The arrangement of parts (like leaflets or feathers) on opposite sides of a central stem or axis, resembling a feather.
- The pinnation of the fern's fronds makes it look delicate and symmetrical.
- Botanists study the pinnation of leaves to identify different plant species.
- The bird's wing shows a clear pinnation of its primary feathers.
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