spurious wing

Noun
  1. Tuft of small stiff feathers on the first digit of a bird's wing (synset 101900308)
    is a type of: feather, plumage, plume - the light horny waterproof structure forming the external covering of birds
    is a part of: wing - a movable organ for flying (one of a pair)
    same as: alula, bastard wing

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