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01
(ornithology) a tuft of small, stiff feathers attached to the first digit of a bird's wing that helps control flight at low speeds
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grammaticale informatie
Voorbeelden
The alula helps stabilize the bird during flight.
02
(entomology) a scalelike membranous structure between the base of a fly's wing and its halter
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Voorbeelden
The alula helps stabilize the fly during flight.
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