plumula

from The Collaborative International Dictionary of English v.0.48

Plumula \Plu"mu*la\, n.; pl. L. {Plumule}, E.{-las}. [L. See
   {Plumule}.]
   1. (Bot.) A plumule.
      [1913 Webster]

   2. (Zool.) A down feather.
      [1913 Webster]