1. Scalelike structure between the base of the wing and the halter of a two-winged fly
   - calypter 
2. Tuft of small stiff feathers on the first digit of a bird's wing
   - bastard wing, spurious wing

Derived forms: alulae

See also: alular

Type of: feather, plumage, plume, squama

Part of: fly, wing

Encyclopedia: Alula

• oust
• ouster
• ousting
• out
• out and away
• out front
• out in
• out loud
• out of
• out of action
• out of bounds
• out of breath
• out of doors
• out of gear
• out of hand
• out of it
• out of keeping
• out of line
• out of nothing
• out of order
• out of place
• out of play
• out of practice
• out of print
• out of reach