leghorn

from WordNet (r) 3.0 (2006)

leghorn
    n 1: a stiff hat made of straw with a flat crown [syn: {boater},
         {leghorn}, {Panama}, {Panama hat}, {sailor}, {skimmer},
         {straw hat}]

from The Collaborative International Dictionary of English v.0.48

Leghorn \Leg"horn\ (l[e^]g"h[^o]rn), n.
   A straw plaiting used for bonnets and hats, made from the
   straw of a particular kind of wheat, grown for the purpose in
   Tuscany, Italy; -- so called from Leghorn, the place of
   exportation.
   [1913 Webster]