Source : WordNet®

portmanteau
     n 1: a new word formed by joining two others and combining their
          meanings; "`smog' is a blend of `smoke' and `fog'";
          "`motel' is a portmanteau word made by combining `motor'
          and `hotel'"; "`brunch' is a well-known portmanteau"
          [syn: {blend}, {portmanteau word}]
     2: a large travelling bag made of stiff leather [syn: {Gladstone},
         {Gladstone bag}]
     [also: {portmanteaux} (pl)]

portmanteaux
     See {portmanteau}