leghorn(n = noun.artifact) boater, panama, panama hat, sailor, skimmer, straw hat - a stiff hat made of straw with a flat crown;
is a kind of chapeau, hat, lid

   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]

leghorn, n.
1 a fine plaited straw. b a hat of this.
2 (Leghorn) a a bird of a small hardy breed of domestic fowl. b this breed.

Etymology:
Leghorn (Livorno) in Italy, from where the straw and fowls were imported