Indument

from WordNet (r) 3.0 (2006)

indument
    n 1: a covering of fine hairs (or sometimes scales) as on a leaf
         or insect [syn: {indumentum}, {indument}]

from The Collaborative International Dictionary of English v.0.48

Indument \In"du*ment\, n. [L. indumentum a covering. See
   {Indue}, and cf. {Induement}.]
   1. (Zool.) Plumage; feathers.
      [1913 Webster]

   2. (Bot., Zool.) A dense covering, especially a hairy one;
      called also {indumentum}.
      [PJC]