alula

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alula

(ăl′yə-lə)
n. pl. alu·lae (-lē′)
A small joint in the middle of a bird's wing, homologous with the thumb and bearing three or four quill-like feathers. Also called bastard wing.

al′u·lar (-lər) adj.
References in periodicals archive ?
The postoperative radiograph revealed a complete resection of the alular bone.
(19) In the case we describe, amputation of the alular bone was elected because of the limited role of this bone during flight in companion birds.