al·u·la /ˈæljələ/
小翼
Al·u·la n. Zool. A false or bastard wing. See under Bastard.
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alula
n 1: scale-like structure between the base of the wing and the
halter of a two-winged fly [syn: calypter]
2: tuft of small stiff feathers on the first digit of a bird's
wing [syn: bastard wing, spurious wing]
[also: alulae (pl)]