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-las

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

Plumula \Plu"mu*la\, n.; pl. L. {Plumule}, E.{-las}. [L. See
   {Plumule}.]
   1. (Bot.) A plumule.

   2. (Zo["o]l.) A down feather.