flight feather
US /ˈflaɪt ˌfeð.ər/
UK /ˈflaɪt ˌfeð.ər/

1.
bulu terbang, bulu sayap
one of the large, stiff, and asymmetrical feathers on the wing or tail of a bird, essential for flight
:
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The eagle soared high, its powerful wings propelled by strong flight feathers.
Elang melayang tinggi, sayapnya yang kuat didorong oleh bulu terbang yang kokoh.
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Scientists study the structure of flight feathers to understand avian aerodynamics.
Para ilmuwan mempelajari struktur bulu terbang untuk memahami aerodinamika burung.