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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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.