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aftershaft

资料来源 : pyDict

副羽

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Aftershaft \Aft"er*shaft`\, n. (Zo["o]l.)
   The hypoptilum.

资料来源 : WordNet®

aftershaft
     n : a supplementary feather (usually small) on the underside of
         the base of the shaft of some feathers in some birds
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