from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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, spurious wing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Bastard wing. A small projection on the anterior edge of the wing on some birds.
from the GNU version of the Collaborative International Dictionary of English
- n. A false or bastard wing. See under bastard.
from The Century Dictionary and Cyclopedia
- In ornithology, the winglet, bastard wing, or ala spuria of a bird; the packet of small feathers which grows upon the so-called thumb of a bird's wing.
- In entomology: The small membranous appendage or scale situated at the base of each wing of many dipterous insects, above the halteres or poisers.
- A similar appendage beneath each elytron of some water-beetles. Also called alulet and cucilleron.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. scalelike structure between the base of the wing and the halter of a two-winged fly
- n. tuft of small stiff feathers on the first digit of a bird's wing
New Latin, diminutive of Latin āla, wing.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin; diminutive of ala ("wing"). (Wiktionary)