alula(redirected from alulae)
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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.
alula, alula spuria
the freely articulated first digit of the avian hand. Called also bastard wing.