alula /alˈū-lə/

In birds, the bastard wing

• cotton thistles
• cotton tree
• cotton trees
• cotton waste
• cottonweed
• cottonweeds
• cottonwood
• cottonwoods
• cotton wool
• cotton wools
• cotton-worm
• cotton-worms
• cottony
• cottony-cushion scale
• cottown
• cottowns
• cotts
• cottus
• cottuses
• cotwal
• cotwals
• cotylae
• cotyle
• cotyledon
• cotyledonary